Let's see.... Once when I was in 1st grade I accidently walked in on a girl who was naked (changing from a bathing suit).... Probably more embarrassing for her I guess....
One time I let one go in the middle of a 7-11....
Once I sneezed on my jacket and it left a glob of snot on the sleeve.
I walked into the girls' bathroom in 8th grade. No one was in there fortunately.... but people were going in while I was heading out....
That's about all I can think of right now...
*shrugs and walks away*