Improve the People 'collisions' - people bump into each other, stop suddenly, rotate, move and bump again like robotic vacuum cleaners. In practice people more fluid and less jerky in their movements when walking with other people or in a crowd.

Watch out for an adult walking behind a slower moving child - the adult goes crazy trying to get past repeatedly trying zig zag patterns, stopping and starting. People who walk towards each other in real life don't walk right up to someone bump into them then adjust direction - to skim around them / the obstacle - they gradually adjust their course as they approach to avoid the impolite "collision".