Explosives

Last night's Fourth of July party featured a lot of serious,
high-powered fireworks, the kind that are illegal in most states.
There were rockets and mortars up to a 3 inch diameter. I could feel
the concussive force when they were launched. Our party was shooting
them off, as were several other people in the vicinity. It sounded
like a war zone, and looked like an alien invasion. It was great.