The title of this article is a conjectural. Though the topic is found within The Simpsons universe, a proper name is not available.
The Burning Coal couch gag is the fourteenth couch gag of Season 11.
The Simpsons (save Maggie, who is in Marge's arms) are barefoot and briskly walking across a bed of hot coals yelping in pain. When the family sits on the couch, they prop their feet up, revealing their black and smoldering soles.