This happened to a guy at school. in year 8 (we were like 13).
He needed to go to the toilet but the teacher wouldn't let him go (you're not allowed in lesson time). He begged her but she refused and refused, until he was like really bursting (it was spilling out on the chair)...so I said, Miss he really needs to go, and she let him. Problem for him was that our school doors had locks on them, and you had to turn the lock and the door knob at the same time to open the door..now he was holding his crotch to stop himself from peeing...
he had to let go to open the door and it went everywhere and his facial expressions
...everyone was laughing even the teacher...He NEVER lived it down...and I've left school now!! The head came in and was mad at us all for laughing (we were all still dying ages after)....a mess.
My best friend had the misfortune of having tight pants. It was winter and it snowed heavily. We were all playing in the snow at break time, and my friend slipped. He has a condition where his nerves are damaged, so he can't feel cold, heat or touch at all. His pants ripped, batty first, and i mean it was a wide ass rip
and he didn't realise...all his asian friends kept saying to him...'hey man, you cold?? Feelin' chilly?' but he had no idea...we had ICT after, and he came in, after going home to change (he lived opposite school) and his pants he came back with were even tighter!!
The same friend and I were in english revision, and we were in a room with some other guys. One of them threw a book at him saying 'could he feel it?' so my friend responded, if i threw a chair at you would it hurt? The guy said yeah...and that's what my best friend did
Picked up a chair and launched it at the guy...he shat himself...and didn't say a word.