The craziest thing I did with fireworks was to go down to the Shenandoah River and stick bottle rockets into a horizontal pipe, aimed at the river. The bottle rockets would shoot into the river and explode underwater.We used to hold them in our hands while shooting them.
Until one day, i was "smart" enough to read the instructions - which said NOT to do that, but to stick it in the ground before lighting.
The Roman candle blew up. That would have been my hand. And important lesson for an idiot.
We thought that was pretty cool. The fish 50 yards up and down the river would jump out of ther water.