We used to blow up unexploded mortar bombs etc with a block of explosives, a detonator and a fuse but what is a CONTROLLED EXPLOSION?
Wow. When I was a kid, we just used firecrackers. Obviously I grew up in a dull neighborhood.
I asked a question. I’m not interested where you lived a couple of years ago!
A examples would be a rocket engine, the use of explosives to implode a building so that it doesn’t damage near by buildings.