### Comment:
I watched it 5 times. Here they tighten it down: https://youtu.be/9P_1_oLGREM?t=676 and when the ball hits the clamps pop up/open. https://youtu.be/9P_1_oLGREM?t=689

### REPLY:
Hmm interesting, yeah they actually do clamp them down, but those clamps really aren’t doing anything. You can see how easily they pop open and allow the glass to flex and disperse the energy.

### END.