Sorry but I'm overly cautious about those things.

Can you create & post a how 2 video so we know it's a safe thing to do?

Just kidding. Don't do it & I don't recommend that disasterlady try it either.

I doubt that the gaseous expansion of a firecracker would be enough to break a window out but I wouldn't think that a .762 round would create enough to pop the windshield out of a cargo van with the rear doors open ... but I've seen the results of that mistake. No, it wasn't me that did it but I did get pulled in for the IG report.