From the bend in the stairwell, Machete saw much of the EzFlame naplam had hit the top part of the barrier and was burning the ceiling more than the wall. However, it soon flowed down lower and spread towards the floor, burning through the old insect's nesting like flaking papyrus. The air was beginning to fill thick with black smoke and smells so bad that the gas masks couldn't scrub it all. In fact, air was starting to become problematic as the flames pulled all the oxygen out of the stairwell, but just as the dizzyness was pushing you towards a panic, the fire broke through the wall and flared at the new source of oxygen.
Well, the fire didn't really break through so much as the couch did. The fire weakened the wall enough that what it was holding back crashed through. It all came pouring down, an avalanche of broken furniture and refuse with a mix of old dessicated corpses thrown in for good measure, all tumbling down the stairwell into the fire and towards the lower landing of the 84rd floor. The flames were already spreading.