Our GCSE Science teacher brought a set of pig's lungs to class, around which we all gathered to watch as she demonstrated their function and dissected them for us. As part of the demonstration, she stuck a tube into the windpipe, and asked Chris Belton to blow into the tube so we could see the lungs inflate. Chris obliged - only for someone to bring their fist down on top of the inflated lungs, shooting air and mucus from the lungs back up the tube and into Belton's mouth.

I've had this for a while, but I can't decide if it's good enough to go with the original story. What do you reckon?

In Year 9 Science with Miss Hayward (one of our teachers who couldn't multi-task on a whole new level), we were doing that same demonstration to show breathing, pumping the air in to see the lungs rise, and then releasing it so the air all went out. This process was repeated several times. Then came the point where she made the mistake of trying to talk and demonstrate at the same point. Needless to say, she entirely forgot to release the air out the lungs, which promptly exploded and coated our entire class. Skill.