The rule is that the DM narrates the results, using dice if necessary. There are rules that form some boundaries to the situation, like it probably shouldn't be *more* than 20d6.
I just look at that list you made and think "yeah, any of those seem like the sort of thing that *could* happen if someone not a circus performer fell twenty stories. And which it is probably depends on a dozen interacting things that I, not a circus performer, don't (care to) know."