Ilovepets-that happened to me once. I was in 6th grade (only year I actually went to school (homeschooled all the rest)) and everyone probably thought I was a goody two shoes (boy are they wrong-I'm not bad, I'm just not NEARLY as quiet as I was there) and I was put with this really loud boy to do a presentation. Everyone started laughing and I almost cried-he was one of the "popular" kids and I barely knew him. I ended up doin 75% of the work while he talked to his friends.
IHIW you are walk/running up the stairs, with your class, and you trip, fall, and your shoe falls off...*facepalm*