This is something they warn anyone getting firefighting training not to do. After many hours of fighting fires, one becomes very tired... however it is a very bad idea to fall asleep in front of a raging headfire. However, it doesnt seem that too many people would be likely to do that... it seemed that firefighters were really being warned against having a 'quickie' in front of the fire. Apparently, in the heat of passion some firefighers were unaware of the fire bearing down on them. In any event, you should probably wait until you're out of harms way to go at it, even though fire is a turn-on. Or at least, go into the 'black' first. and use your fire shelter.