Bean cans? Pfft.
We had a mate with a farm, and a friend with a dad who homebrewed.
We used to get shotgun cartridges from our farming mate and small co2 canisters from our brewing mate. Puncture CO2 canister, put propellant from shotgun into it and make a fuse.
We blew a basketball swallowing hole in a friends frozenn garden one time, put out the neioghbours greenhouse.
Another time – stupidly stuck a glowing splint into the end of one when it went out, don’t know how we werent’t killed maimed or blinded by it. Couldn’t hear for a couple of days properly.
The fertilizer and diesel , that is a whole other story, which a couple of friends got a slap for from the local policeman.