Abstract: This invention is a line throwing rescue gun which is inexpensive and easy and efficient to use. The rescue gun utilizes a combustible gas which is sprayed into a chamber of the rescue gun and then igniting thereby propelling a projectile attached to a line over a substantial distance. The invention is also a method for using a rescue gun wherein the projectile is greased and ramrodded into the barrel of the rescue gun, whereby an aerosol combustible gas is sprayed into the chamber of the rescue gun, the chamber is sealed and the gas is ignited thereby propelling the projectile through the barrel towards a specified target.