Hey, that looks pretty darned cool! ;).

I breifly looked at your cloth/bouncy script above... and had some problems with it (had to reduce the step-size from 10 to 1 for my faster machine, for one thing :) ), but I didn't spend enough time with it to figure out what all the issues are.  I managed to get the ball to collide with the floor (instead of passing through it), and it bounced back up, but some of the verts stay on the floor, so it eventually mangles itself up pretty bad.

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