Wednesday, November 6, 2013 9:13:43 PM
I used to do that thing with the stairs in #7. A lot depends on the surface and shape of the edge of the stairs and the soles of your shoes. The stairs have to be smooth with a rounded edge, preferably steel, and your shoe soles have to be fairly hard and slick with no heel. I just happened to have a pair of shoes like that when I just happened to have an office in a building with stairs that met those requirements. When I got bored, I'd take the elevator up to the 6th floor and do that all the way down to the lobby.