RE: Squeege - I know where THAT comes from:
On 9/11 (or was it the first WTC attack) there was a group of people stuck in one of the elevator cars - NO ONE had any gear, except the window guy - they got the doors to the car open, and used the back edge of his squeege to cut through the triple layer of sheet rock that made up the elevator shafts to get out

I personally would have used my 6" folding saw <img src="/images/graemlins/smile.gif" alt="" />

If we are NOT talking a building collapse situation - JUST a stuck elevator (blackout etc), the main things I'd want is a cell phone, a flashlight, a bottle of water, and a candy bar/food bar.