Reflecting on the old and new (due to new rules in Xanathar's...) answers here about the distance someone falls, I'm trying to brainstorm how to make sure I fall alongside someone else during combat who hasn't intentionally fallen.
Let's say we're fighting a Roc while balancing on a tightrope and the Roc cleverly shoves one of us to our doom. If the fall speed was slow, or if fall speed was spread out over the round, I think I could catch up to someone (with appropriate shenanigans, like Misty Step or Far Step). But Xanathar's says:
When you fall from a great height you instantly descend up to 500 feet. If you're still falling on your next turn you descend up to 500 feet at the end of that turn.
The instant descent has got me stuck. I suppose I can take a readied action each turn, and then use my reaction to jump off the rope as soon as one of my companions falls. And of course if I have Feather Fall I can slow their descent, but I flunked out of the wizard academy by trying to have a demon take care of every obstacle in my final exam instead of casting a spell myself.
Is my companion doomed to a splattery death?