A variation of the sexual position "
piledriver." During intercourse from a piledriver position, the partner being piledriven emits a fart and the fart is lit on fire (either from a heat source supplied by one of the two partners or from a third party) while someone makes the
telltale beeping noise of a ceiling
smoke alarm (again, either partner or a third party may supply this noise).
When the drapes caught fire during their second attempt at the South Padre Island
Smoke Alarm and the actual
smoke alarm woke every guest up, Carl and Carla knew they wouldn't be allowed to film their
piledriver sex scenes in the hotel lobby any more.