Hmm, all I have is stupid stuff I did when I was little kid.
When I was 10, we blew a small hole in the street. Not a close call, but even that age we knew that you don't light fireworks off in your hand.
It was neighborhood effort. Me and all my friends got all the fireworks we could, opened them up, and poured the gunpowder into a coke can. We filled it up completely. One of the neighborhood kids, the m80 expert, made a nice long fuse for the thing too.
The street I was living on at the time had a really huge cul-de-sac. We placed the coke bomb in the center of the street, and then hid behind a block wall like 40 feet away. (Because every G.I. Joe knows about SHRAPNEL). We sent the m80 expert to light the 5 foot long fuse. He lit it, and ran.
20 seconds later, BOOM! There was a huge loud explosion, some aluminum shrapnel hit a nearbye car, and there was a 10 inch crater left in the street. One of the neighborhood kid's ears were ringing for a week, and he had to go to the doctor to have it check out. We also now had a pothole in the street that pissed all the adults off when they ran over it.
Now that I think about it, I'm surprised we didnt blow ourselves up playing with crap like that. Or get caught by our parents making it. Go figure, some kids blow off their hands playing fireworks regular fireworks, we make a small bomb and come out alive.
The week after that, we decided to set smoke bombs off in my neighbor's house. The dummy dropped a lit smoke bomb on the carpet and set the carpet on fire. We had to run and throw a couple buckets of water and use our super soakers on it to put it out. (Because calling the fire department at that age would have meant BIG TROUBLE). Since they had this crappy ass dark brown carpet, you could hardly tell it had been burned.