Let’s see, my most horrific 4th of July memory was when a kid I knew in Jr High was messing around with an M-80. He was “fake” lighting the fuse by moving the lighter flame right next to it then yanking it away.
Unfortunately he finally accidentally lit it and since we were in his garage, he panicked and instead of throwing it, he held it down against the floor to avoid damaging nearby things (and us). As you can imagine….
The M80 blew off this thumb and two other fingers.