Originally Posted by Hostile
You know what works real good?
Propane from a handheld torch. It's heavier than air, so it is easier to fill the tank.
Never thought of that.
Reminds me of something a guy I know did on the 4th of July one year.
He filled a big punching balloon with Acetylene and Oxygen. Had the balloon in a giant box and then fired a Roman Candle at the thing from about 20 feet away.
I've never actually felt an explosion before but that thing was deep in sound and moved you.