Wednesday, July 30, 2014 8:39:10 PM
Actually, this was almost certainly congenital myotonia. Dogs, goats, humans, and a few other species are known to have mutations where, in situations of extreme excitement or surprise, they can lose motor control and even fall unconscious. This is especially common in miniature Schnauzers, which this particular dog is.
Just go take a look at some of the "fainting goats" videos if you want to see more of this disease.
Wednesday, July 30, 2014 4:51:23 PM
Poor little chap got over came with enthusiasm See the same thing when Im away working and my folk look after my kitty, I come back and he goes all silly bumping heads, and rubbing his head that hard he knocks himself out