On Fall Damage: The maximum fall damage in 5e is 20d6.
Link to SRD
D&D lawyers will point at this and say "Look, a Serbian guy fell thirty three thousand feet and survived, so you can too!" However, the definition of what Hit Points are in the rules is thus: "Hit points represent a combination of physical and mental durability, the will to live, and luck. Creatures with more hit points are more difficult to kill. Those with fewer hit points are more fragile."
Now, ask yourself the question and answer honestly: If I fell sixty feet or more to a solid ground am I physically durable enough to survive? Am I mentally durable enough that the head trauma would leave me relatively fine? If I did survive that fall, bleeding and broken, would I have the will to live?
Your Honor, I present to the court the notion that if you answered "no" to that question then Hit Points no longer apply and your squishy meat mech of a body has entered the realm of pure chance. I motion that you're either dead, or making Death Saves if the DM is generous and thinks you can be saved, and that's a good time to consider what your next character will be.
The Prosecution rests.