Power with Control
Which doesn't explain why the rear window shattered in exactly the same manner.
More likely explanation, the mockup didn't actually have the armor glass and the guy throwing the ball went off-script.
I wasnt trying to connect the sledge with the broken window, just pointing out that the door took that shot without any damage. That wasnt the mockup, that was the actual truck, same one that was driving folks around after the event, I think. They uploaded a video of them testing the windows, but that test showed the windows as being down a few inches....... thats what I think went wrong, they didnt test to conditions.