FIRE!

[Clang McFly]

There is no item in the world that cannot be replaced.

True. It still doesn't hurt(unless your sticking your hands in the flames) to try and save what you can.

Edit: Actually there is an item that can't be replaced. Photos of friends and relatives who are now deceased.

Why don't you watch this training video developed by the fire safety board and tell me there's something worth going back for. The average time for a smoldering fire to catch until full room immolation is anywhere from thirty seconds to a couple minutes. With the construction of most houses toxic black smoke fills the room within about a half minute rendering the eyes useless. Within that same time frame of approximately two minutes, the average room temperature rises to 1,000 degrees. Which is hot enough to sear the lungs and cause painful, nearly instant death with a single breath. That heat and smoke is generally what kills fire victims, before the flames ever consume the structure.

Tell me again what's worth going back in for.

Well yeah in that case its not worth it. The scenario I was imagining was that the fire hadn't reached you yet and you had time to grab stuff and escape safely.