Today Felix Baumgartner jumped from 39 kilometres high and reached the earth safely.
Just considering friction, from how high can a human jump?
I expect that from a certain height, he would have reached a speed so high that he would have burnt when entering dense atmosphere?
Some meteoroids disintegrate when they reach the atmosphere, other don't... so I am not sure what would happen for a 100kg human+spacesuit.
Maybe he could jump from arbitrarily high? (notwithstanding digestion/food/drinks, gravity from other stars/planets, lifespan, cold)