Probably the funniest things that's ever happened to me was when I was at a friend's house and I went to take a piss, his cat followed me in 'cause the litterbox was next to the toilet.
So I'm goin', the cat's goin', all of a sudden I sneeze, wiener slips out of my hand and I pissed all over everything, even the cat.
@Tail and the dog laughed and laughed and laughed.