Throughout the episode, the team keeps referring to a flash over as when smoke in the room ignites due to heat. This term is only half right. During a flash over, the fire burns hot enough to ignite everything around it, including the smoke. A back draft is when the fire burns in the room, depleting most of the oxygen in the space but remains incredibly hot and is not completely out and waits on oxygen to be introduced into the space. In the scene when Frank Damon opens the bedroom door thus burning his hand, this scene can be argued that it's a back draft by the sudden explosion of fire as soon as he opens the door allowing oxygen to enter the room and reignite the blaze and the oxygen supply, rather than a flash over as indicated by the title of the episode.