Warning: This is incredibly epic, and worked fine for me. May cause heart attack due to awesomeness.
Chrome 13, Windows 7 - display driver (Intel Integrated) crashed but Windows managed to recover it. Intel graphics related issue maybe?
Exact same setup and experience for me.
Seems like a general WebGL issue -- I've seen most WebGL examples hang up or freeze on integrated graphics / Intel graphics but they always run absolutely smoothly on "full-blown" gamer-like GPUs (nVidia etc.) Unless your nVidia is on a MacBook but running Linux instead of OSX und thus odd drivers.
Worked great for me until I switched tabs back to HN to read comments. My screens instantly went black while my video card driver thew up all over my desk.
No problems for me at all. Chrome 14, Windows 7, nVidia graphics.
up-to-date Chrome, Mac Lion - worked without causing any disturbance.