[bert]

I know you are old and passed that stage but here’s how it is done.

Take a can with a snap in lid........ a paint can and punch a hole in the side near the top.

Add a few carbide rocks and a little water. Pound in the lid and place the can on the ground lid side down

Light the hole. (be sure to not stand directly over the soon to be elevated can)

[virgil]

My dad used to talk about setting off carbide bombs when he was boy in the 1920s. This is the first I heard about them in a long time.

[Apogee]

We used to use metal tennis ball cans, one for a gas chamber and one with a ball in it. Loads of fun.