You guys got me going, the stories we could tell. About 7 years old, I got tired of the little sound my cap pistol made, so my superior brain figured out that this might work. Remember how the caps, in rolls, came in a roll of 5?
So I find a concrete block, lay the whole roll of 5 on it, go get dad's huge hammer, it was hard to raise over my shoulder, and frammed down.
Well the block broke, loud explosion. I think that started my right ear tinnitis and crap hearing out of that ear ever again. But, it was awesome.