User blog comment:Lalainee/Near Death Experiences!/@comment-1636990-20101104035547/@comment-1874924-20101104062148

I don't recall why people often laugh in such situations, although I knew at one time. If you're laughing during the danger, it's probably a weird stress reaction of some kind. (I'm sure you've all heard of "nervous laughter".) If you laugh after the danger is past, its probably a matter of the sudden cessation of terror leaving you giddy, probably with an adrenaline high. (You may recall that the same thing happened to Owen and Izzy during the "scary movie" challenge.)