I demo a new animation tool we're using at polyarc to help make our first game, Moss! Here, you can see how I take an animation in core posing only, run a quick physics sim, and get a robust looking tweened animation in minutes. I wrote this script loosely based on a workflow described by my buddy Jacob Hinds. Jacob got the idea from from this video:
youtu.be/BTBZgLYO6eo?t=490
(Trick starts at 8:15)