Ivan at Kit Badger just wrapped up his To Build A Fire series in which he pockets a firestarting tool and then jumps into freezing cold water before trying to start a fire. I was present for the filming of one of these videos and it was as miserable as it looks on camera.
I suggest you watch all of the videos in this series, but if you can only watch one, watch the wrap up:
The series graphically shows several lessons learned with the main one being that just because you can light a fire in ideal conditions, doesn’t mean you can light one when you actually NEED one. It also highlighted the attributes you should look for in a firestarting tool – something that requires as little dexterity as possible and buys you time.