Quote Originally Posted by Burney View Post
Why is -5 painful? What's your blood trying to do at that point?
It's trying to burst out of the top of your head. At -5, -6 you start bursting blood vessels in your eyes and your nose and the pressure of the blood in your brain is fantastically painful. Lots of guys have died pushing -8 onwards when something lets go and they have a big bleed on the brain.

Negative g is really quite unpleasant.