Physics with Ammo.js + Three.js by Chandler Prall

A very good guide for beginners in Ammo.js programming. Ammo.js is a JavaScript based physics engine build from Bullet (physics engine written in C++)

Interesting post, good description, but with all respect to the author the demo is not so interactive (which is main advantage of 3D :)

For some reason the demo with falling boxes crashes on my browser after like 10 seconds.
Edited: It is not crashing anymore, I do not know why it was :) I guess to many tabs were opened.

Spec: 
Google Chrome 17.0.963.79 m 

Intel Duo - Core 3.20 Ghz, 4GB RAM I
Internal Intel video card of about 1GB shared memory.

Physics with Ammo.js + Three.js by Chandler Prall