Go to any skate park in the US and watch kids just EAT pavement, with no protection gear, from 10-12 feet in the air. Some of them will curl up, cry, and be hurt. But the majority of them will get up bleeding, limping, and laughing because they just don't give a f%#$* and can take it.
What he said.
Sometimes people bang their head on the corner of a table and die, but most of the time not. People are pretty tough. If you doubt this, watch some goju kararte guys go at it. Or as Keith said, skaters, landing every which way on hard surfaces all day long.