Andrew Hoyer is a software engineer who make good web experiments. Like this one below, The Tumbler, which is a physic simulation made with the motor box2dweb :

Capture d’écran 2014-01-08 à 19.24.54

Or this one called « The Blop », an another physic simulation :

Capture d’écran 2014-01-08 à 19.26.09

So you must check it out, it’s just amazing !

find more experiments here