montana fire
When you do anal with a girl and she tells you she has to fart, so you pull out and put a lighter close to her asshole and shout "fire in the hole". As soon as a flame burst, you quickly go back in to feel the warmness of the fire.
guy 1: "last night heard you were playing Counter Strike, you shout fire in the hole.
guy 2: Oh no I was doing a montana fire with a girl."
guy 2: Oh no I was doing a montana fire with a girl."