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Pneumatic Snowball Cannon

Step 2Burn off the propane

Burn off the propane
You will need a 100% empty propane tank to do this, otherwise, you'll have some interesting results when you start drilling.
I just lit my torch, and left it underneath my porch, where we store fire wood. It's the only place that's outside, not covered in a foot of snow. Thank god nothing caught fire.
Do NOT do it inside, burning Propane lets off Carbon Monoxide, and burning out an entire tank, or even half a tank, could let off enough to kill.

If you use oxygen, I guess you can just let it out.
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