Well, we've shot a poof ball through a window... Don't ask, we weren't playing dodgeball (really, we weren't)

We've built a blasting box for vaporizing steel cable and other high voltage small scale pyro stuff....

When trying to move our mill into the machine shop, we had to take the table off. Now this is a mill table, maybe 500 pounds. So we're sliding it off to one side, when we suddenly realize there's nowhere to put it. One huge dent in the pavement, a very loud noise, and a tiny hammerswing later, we had the mill table embedded about an inch into solid concrete. That was "fun."