When doing a girl in an old Chevy pick up truck, you run out of lube so you grab the bottle of whiskey from behind the seat and apply a lil bit to the dried area. After done with the post-sex smoke, you attempt to flick the cigarette out of the truck, but it bounces back, landing in the whiskey soaked area, thus starting a fire (aka, the barn burner). All while in Biloxi, Mississippi.
Redneck 1: Did you hear what happened to Bob?
Redneck 2: Yeah, he burned his dick off thanks to a Biloxi Barn Burner.