Yep Take a big can with a tight fitting lid and punch a whole in the side at the top add carbide and some water wait a few seconds then light the torch hole. KABOOM home made carbide cannon.
Well that works so well lets use a 55 gal. drum and a lot of carbide. Problem is we should have moved the drum out of the garage so the lid didn't put a hole in the roof.
You can also fill up your lunch sack with Oxy-Acetylene tie it closed and put it on the ground at the welder's table. When he starts back to welding the sparks will ignite the sack and you have a big boom and a pissed of welder.