Question: Was Jack always supposed to die? Or was he originally supposed to survive?
Question: When Jack went searching for the girl in the top apartment of the building he could hardly see because of the fog. As soon as the fire from beneath bursts through the floor the thick smoke has disappeared. Is this normal for building fires?
Answer: I'm not a fire fighter so I do not have a answer based on experience but I assume that when Jack was disoriented it's because there was no light in the building, then when the fire broke through it produced enough light to break through the smoke and make seeing easier for him to escape.
It actually doesn't break through the floor...it's a flashover where everything including the gases in the smoke reach their ignition temperature simultaneously and the room lights off...it's a very serious and dangerous situation to be in as a firefighter...I was in one, luckily we were only 10 feet inside the door.
Steve Kozak