A thing like that happened to me in the eighth grade, it was during recess, I was with a friend of mine, we were playing tag, or cops and robbers, or something to that effect and for the duration of recess, I thought I could hold it in until recess was over...

BIG MISTAKE! I ended up wetting my pants and my friend was there to see it.

I spent the rest of the day with my pants soaked, they were track pants, so they dried up fairly quickly by home time.