PE in your pants
Forgetting your kit would result in PE in your pants. If many forgot, then the hall would resemble a Blue Peter Romanian orphanage crossed with one of Jonathan King's less extreme fantasies.
written by Jo*n Lar*er, approved by Susan

I also suffered this humiliation. I also remember on my first day at school the teacher mentioning that the next day we would be doing PE. As a 4 year old who had never heard this acronym before, I went home explaining to my mum that the next day we had to take peas to school.
Am I the only one thinking that this story is lovely, but not quite what it could be? Wouldn't it have been ace if Clare had gone home and said that the teacher made her do pee in her pants, which started a neighbourhood furore and eventually lynching of a paediatrician? Harumph! - Log
written by Cl*re W*tson, approved by Log

Lacking the appropriate attire for swimming a young lad was horrified to find that his teacher's threat that "children without their togs will have to wear a pair of mine instead" was more than just a bluff. He was further horrified to find that the teachers definition of togs included underwear. A humiliating day spent of swimming in an oversized pair of woman's panties ensued.

Also: pedagogue, not paediatrician unless the teacher did medical checkups too (i know, im a whingy bitch)
written by excluded pupil, disapproved by Phil

While changing for PE, I forgot where I was and absentmindedly removed my underwear as well, this happened twice, but no-one noticed.
(my school was so homophobic that everyone showered in their underwear)
Pete, I think you're just showing off here. The reason WE all showered in our pants was because we were terrified that the cold water mixed with the prescence of our peers would turn our already tinkie winkies into tiny little acorns. Whereas, you would stand there in the middle of the showers, generously and unhurriedly soaping your huge teenage schlong, whist winking at the other boys. - Mansh
written by Pe*e L*mas, disapproved by Mansh

At my infant school, it was actually mandatory to do PE in your underwear. But then they did give us free milk. And raisins. Ah, the Seventies... couldn't get away with that sort of thing now.
written by Ch*d Bu*, deleted by Phil

Our PE teacher at my prep school, if we fog got our swimming kit used to make us do the class in our birthday suits. Before we were allowed in the pool we'd have to line up along the pool side for what seemed like an eternity. At that age (seven/eight ish, I think, a long time ago and I might be repressing) it was quite a task to remember which day was a games day and if it was raining they would often spring a swimming lesson on us instead.

Also of note from this PE teacher, I was advised from an older boy, NEVER be the last back from a cross country run. I was not a particualy fast kid and these runs were numerous but I was never the last back on this kids advice, well once but someone moved the flags. He was talking about a showering on your own with the PE teacher watching.

Away from the point of PE in your pants or worse, I remember we used to plant drawing pins on each others chairs. One study period that this PE teacher took I was dared to put two on his chair, one for each cheek, not expecting he would be so dense as not to check the seat before he sat down. I still have an image of his balled head turning an increadable shade of red. The whole class got detension until the culprit confest or was ratted out. You know, I wasn't grassed on or even given any encouragement to confess, which the kid who dared me and myself did anyway (the guilt of getting the whole class my punishment was to much), now that's loyalty from the class and from my friend.
written by Do*gla* F*nl*y, deleted by Log

In our infants school, doing PE in only your pants and vest was not a punishment for forgetting your kit, it was standard practise. It was how most school plays were performed. This is normal, right?

Right?...
written by Go*ty*Got*y, deleted by Mansh

The first day I went to Sunday School (the only time I believe) I was collected by my mum afterwards and I gleefully informed her that we had all sung a song about cheese. It went: 'Cheese us, cheese us...'
written by An*y W, deleted by Conor

One guy in our class forgot his kit and had to do football in his pants on a cold autumn day. Our school being a bit pov didn't have those posh bib things, we always did the traditional 'shirts' and 'skins'. Being a typical bastard PE teacher the kid was forced to play on the 'skins' team, in goal. Us 'shirts' took great delight in kicking the ball at him.
written by Da*e Bir*, deleted by Rosy