Some Idiots Light off Mortar Shell in Closed Garage [NSFW Video]

Ah, the Fourth of July. It's everything that is America - hot dogs, apple pie, swimmin' holes, and lighting off mortar shells in your closed garage with your drunk buddies.

No better way to celebrate our great country, right?!  

Well, that's what these bros thought, anyway. It went just about as well as you would expect.

Why did they do this? Where did they get those helmets? What did they think would happen?!? Was the Miller Lite box supposed to protect them?!?

There are so many questions.