Match heads in vase chain reaction - video

[Bony]

And I remember as a teenager stuffing as many match heads as possible into a spent .22 case, crimping over the end then giving it a whack with a hammer. I was deaf for a couple of days and had to dig out a shard of brass cartridge from my leg.
It sure did explode forcefully nearly took the hammer from my hand. I learnt a good lesson that day.