Thanks for the replies, I was thinking about a small fire but with it being pretty air tight I don't know how it would burn but now that I think about it , it would probably just smolder, just what I was looking for. Speaking of smoldering I'm going to hijack my own thread and tell a side story. When I built my house a few years back we were about two weeks away from moving in and were finishing up some staining of the woodwork and my wife threw the stain rags in the trash can. Closed up the house and the next morning opened the door and saw a totally black house inside. Spontaneous combustion from the rags started a fire, burned a hole in the living room floor down to the basement and smoke damage thru out the house. The fire marshal said that if we had opened a door to let air in the whole house would have gone up in flames. The house was so tight it just smoldered because of no air. The heat inside was so hot it melted the smoke detector 50 feet away in the bedroom. All the tile had to be ripped up, kitchen cabinets replaced, new dining room set and lots of clean up and repairs. Getting back to my original post I guess I blocked out starting another fire but I might give it a try. Putting it in the pool does not sound too good (Ha Ha), nor pouring water on it. Dry ice might be good but I don't know where to buy it.