Fire on a surface ship is dreaded. Fire on a spaceship? Also dreaded, and it being a very bad thing is a science fiction trope. We're about to find out just how bad.
NASA plans on intentionally setting fire to a used cargo capsule this week to find out just how fast fire spreads in the atmospheric mix we use, how microgravity affects a large fire, etc. The data will help them design better fireproofing for ships.
It might also tell science fiction writers how to accurately portray this particular kind of accident in space. I'm looking forward to the findings.