how much weight to crush human head

i know it doesnt take that much weigh to crush the skull

but is it possible to actually do tomuch jiu jitsu and eventuallly get your head squashed?

(serious question LOL)

There was a show on like Discovery called One Way Out where this magician / escape artist (he had a bald head) did all kinds of feats on camera. "Car on my head":

Jonathan tests his limits while being crushed. He's sealed inside a vacuum bag as the air is sucked out, has massive amounts of weight placed on his stomach and tries to survive the weight of a car resting on his head. In it, he works out the amount of force a head can withstand, and which angle for his head is the strongest.

*big sigh*

disturbing..

i think it just takes 1 Joey Karate