All I can say is DONT OPEN THE DOOR when its doin that sjit! I know a guy here that had a homemade wood stove kneeled down and open the door latch to see if he could figure it out and WHAM the door slammed him in the face. He was unconcious for hours until someone found him nearly dead. He now is a dimm (er) wit with a plate in his head.
Kansas
Kansas