Once when I was in second grade, in french class I had to pee SO bad I couldn't even move, of course I didn't know any ways to relieve the pressure because I was only young... so I was just lying there trying not to piss my pants.. when we got back to homeroom I asked if I could go to the bathroom (The french teacher said no when I asked) and she said no too. I can't remember what happened after that, but I know I made it to the bathroom... barely.