These little characters started as an experiment with soft bodies using Houdini's FEM solver. The tricky part was getting their facial expressions to change at the end without breaking the sim - so instead of simulating the characters themselves, low resolution geometry was simulated in their place and then used to deform the high resolution characters. That way their mouths could move without going all wacky. I like to image they can't control where they go, but travel wherever forces take them. 😮 Rendered in Maya and V-Ray.