Here's something interesting for those who've never seen what pressure differential can do. On Discovery Channel, MythBusters did an experiment to test the 'myth' that a loss of pressure at 300 fsw in a MK-V would squeeze a diver's body into the hat. Anyone who ever attended dive school knows that it isn't a myth, but to see it is something altogether different. It's such a graphic scene. They use a mannequin packed with pig guts to simulate a diver. It's litererally the most freakish sight... and the noises the body makes. GROSS!! It'll definitely make you your blood run cold.