A propane torch is used to fill the cannon. 20 - 25 seconds for powerful.
10 - 20 seconds for medium. 5 - 10 seconds for a crappy shot. The guns favorite ammo is pine cones. Today I brought this thing up to my friends house to give him my old mini, and this one puts dents in his tin shed.

I didn't know a mini would be that powerful.
The Whole Gun

Chamber

Chamber Again

Filling With Propane ( had butane on version 1 )

Firing With The Jet Lighter

Enjoy!