When I was a lot younger (I can hardly remember), I was running down the side of a school, and there were a number of air conditioners lining the wall of which I ran parallel. Well, I looked back for a split second, and when I looked forewords again, I ran face-first into the corner of the next AC. Went to the emergency room and had to get stitched up twice, cause that night the first set came out :\
(and I wonder why I sometimes act like an idiot lol)