my touring bike - preferably with the tent & sleeping bag... but I jest.
I have already lived in a house that was prone to fires (well the nature reserve it was on was prone to the fires - the longest period of time being told to stay away from our home was 5 days with the fire getting to within 25 meters of our home) so already have copies of important photos etc off site. We also already have the fire proof safe with the documents in it and there is a digital copy of everything important. I also used to work in a chemistry lab which was rather prone to fire alarms going off and us being evacuated for long periods at a time and learnt the hard way regarding collecting your coat, bag & keys on the way out, and having already sold 99% of what we owned 3 years ago, and subsequently replaced very little of it, the only thing I would get on the way out would be my coat & inhalers (I'm happily go barefoot outside so shoes are not a must have, just a nicety). Everything else can be replaced.