Leave a propane heater on pilot.
HA.....HA......HA.....
..I can see it now, the pilot light goes out and the propain keeps coming you step in and light a match and KABOOOOOM
then your standing there with all the sides of the shanty lying down with a sign saying "WHAT THE HE!L WAS THAT ALL ABOUT" kinda like the road runner
I need to do something about my spearing hole too because that 3 and 4 inch crap is for the BIRDS
. I think I'm going to make an insulated door that goes over the hole