Trying to get the window of a storefront to shatter when kicked from the inside. I have a poly plane which I've shattered and a ground plane on which it can fall. A small poly plane which is going to represent the foot is an animated passive body which moves through the glass. The shatter is deactivated until just before the point of impact. The foot plane collides with the shatters and they move outward and downward. This is going more or less as I imagined for about 10 frames and then it stops. The gravity field is still active so I'm not sure why they stop falling. I put impulses on the shards to move them outward because the impact of the foot plane didn't appear to move them outward. Anyway, I've got this far really just faking it. If someone can fill me in on the correct way to accomplish this I'd really appreciate it.

I've attached a zip file containing the mb file and a playblast which should make it all clear.