Read a scholarly article about a real masturbation disaster in a medical journal at university a few years ago
A bloke researched a 'constriction device' on the internet. He built a sort of low oblong tent, big enough to lie in, all sealed airtight and with an internal frame made of plumbing pipes.

The pipes had holes drilled in them at intervals and one pipe led off to the Hoover tube. The bloke climbed inside, reached his hand out and pulled the Hoover plug inside along with an extension socket.

Then he plugged in the Hoover and all the air was sucked out of the tent, and he suffocated. His teenage son found him that afternoon on the lounge floor, Hoover still running.

The various doctors who turned up to inspect the scene (word travels fast!) took bets on how long it would take for the tent to empty of air. Three minutes? Two minutes? One minute? They set up the apparatus again to try it. turned out that it would have taken less than a minute for the man's chest to be fatally constriced and his hand to be pressed onto the plug so he couldn't release it.

This is true. There were other wank-disaster stories too but this one sticks in the mind - there was a photo, for a start.
(Juan Quar is clinging to her front teeth on, Thu 24 Feb 2011, 17:57, Reply)