You know what's even cooler? Get a water bottle with a little cap (not a gatorade-sized cap, like a Coca-coola cap). Then hold it and let gas into it with a lighter in a still-aired place. Don't flick it, just let the gas out. Then after ten seconds or so, flick it and get a flame. Then hold it close to the hole ... tilt it a little, and phwooooooommmmm! Flamethrower effect for about 3 seconds if you do it right