PE Change rooms
I was at an all boys school and as such we were all disgusting little rotters. I recall a particular time when it became fashionable to spit on the ceiling of the PE change rooms and see how long it would stay there. On one occasion someone in my class spat a large sinewy green slimy loogy onto the ceiling. It's sticky mass held it together and conspired to keep it there for no less than a week. It slowly ebbed off the ceiling until it was hanging by a thin thread of mucas about 15cm long.

It was a thing of wonder and since everyone in the school used the change room at varying times during the week it became quite a celebrity. We were all secretly envious that it wasn't any of us who had spawned this wondrously disgusting and fascinating creature.

Come Monday our little alien friend was no where to be seen. Many tried to replicate the feat accomplished by our class mate, but they all failed. On occasion some unlucky souls across the rooms were covered in monstrous loogy's by those spitting at the ceiling, although sometime you had to wonder if they really were aiming at the ceiling. Bad aim once you can forgive, but when the same guy receives numerous helpings on the naked skin of his back by various people you have to wonder.
(The Archduke of South London I'm in your Girlfriend eating her organs, Thu 19 Nov 2009, 19:52, Reply)