Dude, what the hell are you doing?!

Ok, so I built one of those beer can alcohol stoves backpackers carry, figuring its camping weather and all. I finish and give it a first try, and it worked! It worked a little too well I think. The quote user a penny as a pressure vent, like the weight on a pressure cooker. Check out what that penny turned into after the 5 minutes it burns for. I know you need to boil water then camping, but smelting metal?
By the way, 15 minutes later, its still too hot to touch.