When i was in first grade, I went to the cinema with my class on a field trip. During the movie, I drank two litres of cola, so when we were on our way back to school, I really needed to pee. Unfortunately, I peed my pants just before I could go in to the bathroom. As I went into the the bathroom to change my pee covered pants, my friends walked in to use the toilet as well, but got a view of my naked ass. For some reason, I forgot to close the bathroom stall door. They still laugh about it to this day.