A few years ago in Math class. I usually went before 3rd period, but didn't need to that day. Math was 4th period, between 3rd and Lunch.
Anyway, I was holding it in REALLY bad by the time there was only two minutes left in class. I'm talking sweating, knees shaking, bouncing up and down in my seat. Two kids were arguing, and the teacher was getting mad. Finally, the bell rings!
"Not so fast!" the teacher yelled.
"AHHHHHH!!!" I shouted in my head.
The teacher made us sit for a minute as punishment for the two kids arguing. I could feel the pee at the end of the tube, just waiting to come out. If I stopped shaking my knees, it would come out! Then, the teacher began releasing us. But she released us in sections. I was in section 2, same as with the two fighting kids.
"Section 1 may go" said the teacher.
"Ah, I'll leave next" I thought.
"Section.... THREE" the teacher said.
"AHHHHHH!!!" I shouted in my head.
At that point, my entire body felt like it had shut down. For a moment, I thought I actually HAD gone in my pants. But I hadn't. Phew!
The teacher finally released my section, and I made a dash to the bathroom, knocking over a few kids in the process. But I could care less.
So if this story has any moral, it must be "Don't hold your piss in".