Second phase of object shaking irreparably freezes the browser

[Caspy7]

After the initial object shakes and when the music changes for the other objects to shake, Firefox freezes and I must kill it.

In Firefox Aurora (29, Win7) on my default profile it just freezes (tested twice). On a fresh profile with one tab open I get presented an unresponsive script warning and if I don't hit stop script quickly, the whole browser still becomes unresponsive. Tested on Firefox 27 on XP and got the same results.

Several others reported the same freezing experience (including Firefox, Chrome, Safari, and Opera on OS X) in the comments here:
https://hacks.mozilla.org/2014/02/html5-css3-and-the-bookmarklet-that-shook-the-web/comment-page-1/#comment-2157702