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Category: Misc
Date: 05/11/09 02:59 PM

67 Responses to Gas Explosion At Strip Mall Caught On Camera

  1. Profile photo of ichamps
    ichamps Male 18-29
    176 posts
    May 11, 2009 at 3:01 pm
    Link: Gas Explosion At Strip Mall Caught On Camera - They`re calling this a natural gas leak, but it looks like a tidy bundle of dynamite aslpoded judging from the blast.
  2. Profile photo of ScottSerious
    ScottSerious Male 18-29
    5316 posts
    May 11, 2009 at 3:10 pm
    im always curious about the asplosions with a camera pointed directly at them at the exact moment it goes off.
  3. Profile photo of Rhasputin
    Rhasputin Female 18-29
    112 posts
    May 11, 2009 at 3:10 pm
    Why was someone standing there waiting for it to happen?

    Gotta be demolition of some sort...

  4. Profile photo of SuperSmash
    SuperSmash Male 18-29
    3758 posts
    May 11, 2009 at 3:18 pm
    Ever heard of security cameras?
  5. Profile photo of opiebreath
    opiebreath Female 18-29
    15782 posts
    May 11, 2009 at 3:22 pm
    Yeah it`s weird that there`s a camera there because it`s moving, unlike a stationary security camera would.

    However the explosion doesn`t look like a planned one at all. But he says "all right" before it happens. :\ So I don`t know what to think.

    P.S. Someone who`s good at physics, why does the building contract before exploding?

  6. Profile photo of PunkAsF82
    PunkAsF82 Female 18-29
    133 posts
    May 11, 2009 at 3:27 pm
    the building may have contracted because when an explosion occurs, all the oxygen in the area would be pulledi n towards the blast, which would cause a change in the air pressure in side htebuilding. this would cau it to contract as the air pressure would pull the building in. this only lasts a split second, as the blast then forces the building outwards again :)
  7. Profile photo of Willowpuff
    Willowpuff Female 18-29
    2221 posts
    May 11, 2009 at 3:29 pm
    @Opie - there`s a camera filming the recording if you get me and the guy says "alright" because he knows it`s going to happen.

    Well that`s what I think`s going on.

  8. Profile photo of Nebbie
    Nebbie Male 18-29
    864 posts
    May 11, 2009 at 3:29 pm
    Looks like he`s filming it off his TV... Notice the logo top-right moves exactly with the video...

    Opie:the building contracted because of a change in pressure (underground maybe?), when the explosion happened. Causing the ground the building is on to shift, making the building buckle slightly. The exploding you see is slightly delayed from when it actually sploded.

  9. Profile photo of J-Dawg15531
    J-Dawg15531 Male 18-29
    122 posts
    May 11, 2009 at 3:30 pm
    The explosion was in Maryland the other day. As to the video, it looks like someone was videotaping their tv while it was showing the security camera footage from the news.
  10. Profile photo of Jailer411
    Jailer411 Male 18-29
    1 post
    May 11, 2009 at 3:30 pm
    That`s not why it contracted.

    Go back to the video and look at the sky during the explosion, it changes as well.

    My guess is that this was caused by the camera.

  11. Profile photo of KekS
    KekS Male 18-29
    588 posts
    May 11, 2009 at 3:32 pm
    Building doesn`t contract, just shaky camera and laggy video.
  12. Profile photo of BrainBits
    BrainBits Male 30-39
    445 posts
    May 11, 2009 at 3:36 pm
    NOT THE FASHION BUG!!! WTF OMG! NO WAY!
  13. Profile photo of Nebbie
    Nebbie Male 18-29
    864 posts
    May 11, 2009 at 3:45 pm
    Watch the windows just before the weird camera shift... They do warp a bit.
  14. Profile photo of thelonious
    thelonious Male 40-49
    3278 posts
    May 11, 2009 at 3:53 pm
    The worst part was it blew up like 4 times in a row.
  15. Profile photo of opiebreath
    opiebreath Female 18-29
    15782 posts
    May 11, 2009 at 4:08 pm
    ...yeah I still don`t understand why it goes all funkyh and contracts.

    Oh well, it`s pretty!

    *replays it*

  16. Profile photo of USFEmoGirl
    USFEmoGirl Female 18-29
    1437 posts
    May 11, 2009 at 4:10 pm
    Meh, stupid stores anyway
  17. Profile photo of Mornaf
    Mornaf Male 18-29
    820 posts
    May 11, 2009 at 4:13 pm
    Yeah, the building explodes just as that guy goes into it. something seems odd about that.
    Assassination?
  18. Profile photo of JJXanadu
    JJXanadu Male 30-39
    516 posts
    May 11, 2009 at 4:13 pm
    Oh crap, someone was walking in front... that sucks. It`s almost as bad as being attacked by a tiger while being strangled by a snake in the path of an oncoming train... almost.
  19. Profile photo of skillz3333
    skillz3333 Male 18-29
    429 posts
    May 11, 2009 at 4:29 pm
    "Yeah, the building explodes just as that guy goes into it. something seems odd about that.
    Assassination?"

    NO ONE WENT INTO THE BUILDING...its just a reflection. fail

  20. Profile photo of Bored2Run
    Bored2Run Female 18-29
    267 posts
    May 11, 2009 at 4:30 pm
    I think the guy walking was just a reflection in the storefront windows. The clip isn`t from a CCTV security cam in the parking lot. And the audio in the background of the guy taping the explosion sounds as if from a walkie-talkie.

    Why be there with a video camera and have other people around just a shoot a shopping plaza? Film crew?

  21. Profile photo of Bored2Run
    Bored2Run Female 18-29
    267 posts
    May 11, 2009 at 4:39 pm
    Looking at it again, notice the watermark at the top? Film clip is "Courtesy of Prince Georges Fire/Rescue Dept."

    This was a clip shot for training purposes. Many times fire and police use vacant or soon to be demolished property for training.

  22. Profile photo of ShadowRyder
    ShadowRyder Male 18-29
    2128 posts
    May 11, 2009 at 5:14 pm
    BOOM! ^^
  23. Profile photo of _Perfection_
    _Perfection_ Male 18-29
    1789 posts
    May 11, 2009 at 5:24 pm
    I was looking forward to a larger explosion.
  24. Profile photo of Boredered
    Boredered Male 18-29
    2508 posts
    May 11, 2009 at 5:25 pm
    This makes sense, record a building randomly :)
  25. Profile photo of habbazoot
    habbazoot
    2132 posts
    May 11, 2009 at 5:36 pm
    bored2run, the water mark is from the camera, fliming another camera`s view. a drive cam, is it is labled in the upper right. people in the car could have been making the noise, and the 2nd camera makes it stupid soundign
  26. Profile photo of Bored2Run
    Bored2Run Female 18-29
    267 posts
    May 11, 2009 at 5:47 pm
    "Habbazoot:
    bored2run, the water mark is from the camera, fliming another camera`s view. a drive cam, is it is labled in the upper right. people in the car could have been making the noise, and the 2nd camera makes it stupid soundign"

    Hey Habbazoot, yeah I saw that. DriveCam is utilized by my many fleets both public servant divisions and private companies. Also Prince George County is a Maryland county, from where this clip was recorded. There`s a redundant watermark since whomever originally uploaded the clip, did so by DriveCam.

    It`s initial origin however I suspect, is not from just the layman taking random recordings at a shopping mall. Notice the empty and papered over windows? None of the businesses appear to be open.

    Here are the links to both DriverCam and the state of Marylands counties.

    http://www.drivecam.com/

    http://www.msa.md.gov/msa/mdmanual/36loc/pg/html/pg.html

    Cheers Ha

  27. Profile photo of brewer4u1
    brewer4u1 Male 18-29
    11 posts
    May 11, 2009 at 5:51 pm
    I live two block from where this happened in Maryland... I thought the world was coming to an end, and about crapped my pants.
  28. Profile photo of desslox
    desslox Male 30-39
    94 posts
    May 11, 2009 at 5:53 pm
    wow finally something that i do ( Im a natural gas pipefitter ) mad it to the board... anyhoot wonder what was going threw dudes head who walked up to the door in the left middle of the screens mind..... i would sugest just by looking at it one of two things set that blast off

    1. prob. a door ringer as the door opened. al you need is a spark and that is why you will never have a gas man ring your door bell.

    2. friction from the look being turned made either a spark or a small static arc. thats all that is needed for that

    imho
    peace

  29. Profile photo of Bored2Run
    Bored2Run Female 18-29
    267 posts
    May 11, 2009 at 6:26 pm
    You never see the guy walk up to the door and ring the bell though desslox. In fact, you never see the guy other than in the reflection on the windows.
  30. Profile photo of krabkat
    krabkat Female 18-29
    1263 posts
    May 11, 2009 at 7:22 pm
    Ok, I agree that the person walking is a reflection in the glass window, but the timing is still awfully close with that big of an explosion. Even if he was crossing the street to get away from the store before it blew it seems strange to me that someone would call an "all clear" for the detonation with him still in the area - would his reflection show if he was far enough away? I`m asking. Also, if this was for fire/police training - what does it show them? There was no fire, no one to rescue - or maybe they had `crash test dummies` inside? Why only detonate in that one far corner? I`m just full of ... questions. I`m just nosy. I have to know everything!
  31. Profile photo of desslox
    desslox Male 30-39
    94 posts
    May 11, 2009 at 8:30 pm
    it is common to evac. the area that is why police and fire are there at a distance. also it does look to my eye like the guy goes between the pillar and the pop machines/ vending of some kind machines? by shadows, it doesn`t look like a reflection to me but i am not there just watching.

    as for a "all clear for detonation" .... never heard of that in my line of work. any detonation other than a burn off isn`t called for. we have ways and means to suck the gas out and distribute it harmlessly into the air so the mixture is inert and no longer explosive.

    as for the explosion in corner.... well that is where the gas accumulated and was in a explosive mixture. you have to have a certain mixture with air to get a bang/flash, to much air or gas and it wont be explosive to little the same effect

    hope that "fuels" the speculation.... no pun intended

    o:-)


  32. Profile photo of SuperSmash
    SuperSmash Male 18-29
    3758 posts
    May 11, 2009 at 9:18 pm
    I don`t get the contraction thing. Shouldn`t the pillars have crumbled as a result of that much movement?
  33. Profile photo of OldOllie
    OldOllie Male 60-69
    15844 posts
    May 11, 2009 at 9:25 pm
    This was definitely gas and not dynamite. I would guess that the FD got a call about a gas leak, and this vid is from the dash cam from one of their vehicles. The building appears to contract because the center of the explosion was pretty far back in the building, and it first blew the roof upwards. That pulled the edges of the roof in toward the blast. (Lay a towel on the floor, pinch the center, and lift up.) You can see the rightmost column lean in toward the center of the blast. The camera shakes because the shockwave travels along the ground faster than the pressure wave travels through the air. Then the pressure wave hits the front of the store blowing out the windows, and the roof is breached and what`s left of it falls back down allowing the walls to straighten. I doubt that this was planned, but at least they were prepared for it. Anything could have set it off from a thermostat to a phone ringing.

    For some reason, the last few characters of a long post get chopped off, so

  34. Profile photo of OldOllie
    OldOllie Male 60-69
    15844 posts
    May 11, 2009 at 9:31 pm
    SS, the columns didn`t crumble because under the brick, they`re probably steel-reinforced concrete. The brick is probably just 1/2"-thick tiles glued to the concrete.
  35. Profile photo of SuperSmash
    SuperSmash Male 18-29
    3758 posts
    May 11, 2009 at 9:32 pm
    So, the rebar just flexed? I can see that.
  36. Profile photo of justjason44
    justjason44 Male 30-39
    97 posts
    May 11, 2009 at 9:33 pm
    Actually OldOllie... it contracted because a natural gas explosion.. isn`t an explosion.. it`s an implosion... so it would suck in.. then expand.
  37. Profile photo of welfarepimp
    welfarepimp Male 30-39
    189 posts
    May 11, 2009 at 9:38 pm
    Sturdy building to survive four blasts. Funny how the guys in the cab and on the radio say the exact same things just before each blast. I bet they`re psychic.
  38. Profile photo of OldOllie
    OldOllie Male 60-69
    15844 posts
    May 11, 2009 at 10:11 pm
    justjason44, I must respectfully disagree. If the pressure inside the building were sufficiently low as to cause the entire storefront to move as far as it did, all the windows would have been blown inward as well. Also, a pressure differential could not possibly exert a lateral force on the wall and cause the column to tilt to the left. Also, if natural gas implodes, you couldn`t run an internal combustion piston engine on it. The thermal energy which causes the expansion is released the same instant the fuel combines chemically with oxygen. You are correct, though, in stating that gas doesn`t explode. Actually, it burns -- really fast.
  39. Profile photo of SuperSmash
    SuperSmash Male 18-29
    3758 posts
    May 11, 2009 at 11:14 pm
    I`m taking sides here, but I don`t see why natural gas would cause an implosion. It`s gas.

  40. Profile photo of SuperSmash
    SuperSmash Male 18-29
    3758 posts
    May 11, 2009 at 11:17 pm
    I actually typed "natural gas, implosion" and Google asked Did You Mean: "natural gas, explosion".

    So, Google is on the explosion side of the debate.

  41. Profile photo of belunan
    belunan Male 30-39
    1507 posts
    May 11, 2009 at 11:18 pm
    Wow, they blew up the same building four times! You don`t usually see that kind of value in a modern construction job!
  42. Profile photo of desslox
    desslox Male 30-39
    94 posts
    May 12, 2009 at 12:02 am
    you are both correct... it is a implosion ( the air being sucked into the explosion) which then explodes outward. trying to think of a good example..ill sleep on it and come back tomm. for anyone wondering but you are both correct just need to let the brain rest for a example lol
  43. Profile photo of Lou-Saydus
    Lou-Saydus Male 13-17
    216 posts
    May 12, 2009 at 12:39 am
    wow that looks bad, i hope there was somebody inside.
  44. Profile photo of Bored2Run
    Bored2Run Female 18-29
    267 posts
    May 12, 2009 at 1:27 am
    Hellfire, enough speculation.

    I`ll make the call to Prince George`s County in Maryland tomorrow.

    I think it`s definitely a reflection of a man in the glass of the storefronts. Additionally, I don`t dispute desslox`s knowledge of gas ignitions. However, I DO think more on the side that this was a planned and intentional exercise by local authorities. Whether or not the explosion/implosion happened as per plan remains to be known. But assuming this was just a "taxi" cam that just happened to be recording a vacant shopping plaza in the middle of the afternoon is far more a reach than the reasonable alternatives.

    Or maybe I should begin believing that 9/11 never happened and yes, in fact there is beachfront property in Arizona. :/

  45. Profile photo of Bored2Run
    Bored2Run Female 18-29
    267 posts
    May 12, 2009 at 1:40 am
    btw, I now have this really weird cyber crush on SuperSmash. I`ll get over it fast...it`s just Springtime and well... brains breed twitterpation. lol :P

    I`ll get back asap after I make a couple calls on Tuesday. Cheers all. :)

  46. Profile photo of Binary101
    Binary101 Male 13-17
    846 posts
    May 12, 2009 at 4:36 am
    didn`t need the replay
  47. Profile photo of JoeYC
    JoeYC Male 18-29
    721 posts
    May 12, 2009 at 5:03 am
    "They`re calling this a natural gas leak, but it looks like a tidy bundle of dynamite aslpoded judging from the blast."

    your a bomb expert are you? gas can do that you know.

  48. Profile photo of TabooPoison
    TabooPoison Female 18-29
    1062 posts
    May 12, 2009 at 6:19 am
    Watching Mythbusters does not make you a bomb expert.
  49. Profile photo of Tinkerbellio
    Tinkerbellio Female 18-29
    1001 posts
    May 12, 2009 at 6:23 am
    ugh, overkill on the replay
  50. Profile photo of Mah_Boi
    Mah_Boi Male 18-29
    606 posts
    May 12, 2009 at 6:50 am
    They`re calling this a natural gas leak, but it looks like a tidy bundle of dynamite aslpoded judging from the blast.

    looks like a tidy bundle of dynamite aslpoded judging from the blast.

    a tidy bundle of dynamite aslpoded

    dynamite aslpoded

    aslpoded


    RAAAAGE

  51. Profile photo of daverazor
    daverazor Male 50-59
    198 posts
    May 12, 2009 at 7:05 am
    they said assploded. sounds like a post-curry party.
  52. Profile photo of partyyyy
    partyyyy Male 18-29
    148 posts
    May 12, 2009 at 7:24 am
    my visa card will do that some day !!!
  53. Profile photo of bankvole
    bankvole Male 30-39
    959 posts
    May 12, 2009 at 8:52 am
    good god. everytime they rebuilt the shop it exploded again. You`d think someone would have turned off the gas
  54. Profile photo of rainmaker3
    rainmaker3 Male 18-29
    34 posts
    May 12, 2009 at 9:00 am
    Hey, did you notice the guy passing in front of the store?
  55. Profile photo of mac_n_cheese
    mac_n_cheese Male 13-17
    148 posts
    May 12, 2009 at 9:31 am
    ok so it was an implosion followed by an explosion...
    this is because the gas needs sufficient oxygen to burn
    in reality there would be more ch4 than O2 so only part ofthe methane would burn (this is almost like two explosions happening)
    1st explosion
    (CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)).
    1 L + 2 L > 1 L (negligible)
    in science a liquid always takes up less area than a gas of same mass so since the water (2H2O) is a liquid it is negligible.
    then what we effectively have is 3 litres of gas ( 1L of methane + 2L of O2) burning to become one litre of gas ( 1L CO2) and thus a lower pressure inside than outside so the air gets sucked in. and since that air contains oxyjen...
    2nd explosion
    any methane that didnt have enough oxyjen to react first time reacts then and the explosion gets bigger ( all the methane that didnt react first time would react now) the energy given off would be much more than the energy of the first explosion a
  56. Profile photo of mac_n_cheese
    mac_n_cheese Male 13-17
    148 posts
    May 12, 2009 at 9:34 am
    CH4(g) + 2O2(g) > CO2(g) + 2H2O(l))*

    to finish off the gas would now expand and the explosion happens

  57. Profile photo of Shaboobalah
    Shaboobalah Male 18-29
    326 posts
    May 12, 2009 at 12:12 pm
    Thanks grade 11 chemistry student
  58. Profile photo of s0rd3dvis1on
    s0rd3dvis1on Male 18-29
    2389 posts
    May 12, 2009 at 12:30 pm
    mac n cheese you forgot
    CH4(g) + 2O2(g) > CO2(g) + 2H2O(l) + fun.
    im gonna be a chem student soon hopefully :D
  59. Profile photo of Slade8
    Slade8 Male 18-29
    952 posts
    May 12, 2009 at 12:49 pm
    And here I was expecting a massive fireball. :\
  60. Profile photo of mac_n_cheese
    mac_n_cheese Male 13-17
    148 posts
    May 12, 2009 at 1:20 pm
    heyy im still in high school...
  61. Profile photo of MrFibbles
    MrFibbles Male 18-29
    311 posts
    May 12, 2009 at 1:27 pm
    "but it looks like a tidy bundle of dynamite aslpoded judging from the blast."

    lmao, and you are a qualified expert on explosion analysis right?

  62. Profile photo of catbarf
    catbarf Male 18-29
    1455 posts
    May 12, 2009 at 3:00 pm
    mac n cheese, I`m afraid you`re mistaken. Very rarely will you see complete combustion, and even then, under very controlled circumstances. You`re going to end up with airborne carbon and hydrogen (Consider the large volume of smoke billowing out of the wreckage), and the reaction uses far less oxygen than complete combustion. There`s only one detonation, the initial one- even if some of the gas doesn`t combust, it`s dispersed too much to combust even if more oxygen is added.

    Furthermore, there`s not going to be two explosions, even with complete combustion. The energy is dissipated extremely rapidly, and the chain reaction cannot continue. The closest you can get to this sort of multiple-explosion event is continual combustion, i.e. burning it continuously as fuel.

    Oh, and you forgot the obvious- all the water released by the combustion is in gaseous form, and therefore the volume stays far too close to the starting amount to cause an implosion.

  63. Profile photo of Conejito1011
    Conejito1011 Female 13-17
    120 posts
    May 12, 2009 at 5:12 pm
    Why is it called a "Strip Mall"? Is it the same as a regular mall?
  64. Profile photo of slayer50515
    slayer50515 Male 18-29
    988 posts
    May 12, 2009 at 6:49 pm
    Conejito1011, its called that because its built as a strip of stores (so i assume). Strip malls arent inside actual mall buildings, they are seperate series of stores chained together.
  65. Profile photo of dairy
    dairy Male 18-29
    382 posts
    May 13, 2009 at 6:10 pm
    thats called a high street.
  66. Profile photo of HarryBalszak
    HarryBalszak Male 40-49
    1589 posts
    May 13, 2009 at 8:40 pm
    "lmao, and you are a qualified expert on explosion analysis right?"

    No. But he did stay at a Holiday Inn Express last night. ;-)

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