Well something appears to be happening under that trash can.
The trash can has risen about 5-6 inches. So I thought I'd try to find out just what is going on under there. I got a lighter, and opened the valve. I didn't see any flame, but I could feel heat.
Then this happened.
I guess it worked. I think the gas coming out of the valve burned. Like I said, I couldn't see a flame. I suppose it's possible that I just caught the plastic on fire, but I'm not sure. I need to wait for more gas to be produced and then try again.