After 30' you're a goner.
Is this a fact? A 30' fall usually kills? That's around 3 stories, I guess. It seems that people have survived that jumping out the window in fires.
there are a lot of variables - age, elevation, striking things on the way down, etc.
go here to learn about how a window washer survived a
47 story fall:
story and here for a medical study from 1971 that breaks down 200 surgical cases of people who fell:
surgical study bottom line - (1) do not hit your head ( no, duh ), and (2) try to not injure your pelvis - it's a leading indicator for increased mortality rates.