@RavenSoccer Yeah. It's called game physics. The GTA God either decides you die when you land or you manage to smack your face on a balcony railing leaving this stretched blood texture on the glass, hit the back of your head on an air vent, causing the stiff ragdoll (your character) to bounce for absolutely no reason at all, and have you plummet once more, except takes less time to hit the ground.
Basically as long as you hit a few other things on the way down, the force of the fall is dropped dramatically, SLIGHTLY increasing your chances of surviving, with a few concussions and broken fingers, too.
Hope this answered the question. If it didn't, maybe someone else here has an answer much more closer to yours.