This is similar to a cocktail party game I once played. You get everyone in a circle, and then you choose someone across the circle to look at. Basically, ever

This is similar to a cocktail party game I once played. You get everyone in a circle, and then you choose someone across the circle to look at. Basically, everyone is looking at someone else, and they, in turn are looking at someone else (not you). Then, you're asked to mimic as exactly as you can the person you are looking at. Everyone starts out standing still. But soon, funny stuff happens. Little inevitable movements by people are mimicked and magnified as the movements ripple down the chain. Eventually, you get ridiculous huge movements that ripple. It's a fun game, and I suggest everyone try it out with a group. It's a real life experiment of signal and error amplifications.