http://www.swissknifeshop.com/swiss-chocolate-knife

What will you do with cable ties?
What do the wave and the squirt together add that you couldn't do otherwise?
Four flashlights? How long is it dark in your winter on the train?
What do you plan on lighting with the lighter?
How will you use the blank CD-ROMs in an emergency?

What do you wear to work? Suit? Casual? Would a photographer's vest look out of place?*

I'd recommend either a dust mask or a good bandanna. I'd recommend a pair of leather work gloves - train wrecks can leave broken glass and sharp metal edges around.

A glowstick or other light you can leave behind if there are trapped people you want to give some solace to and light the way for rescuers.

*I have a couple of photographers vests, and I wear one when flying - it gives me the equivalent of a 3d carry on that the people at the gate either never notice or don't mention. I have an ARRL patch and a khaki US flag (the vests are khaki). There are lots of hams out there, and I get some comments from them. That gives me someone who might reach out to me if I need it. The US flag draws occasional favorable comments from the TSA agents and some passengers. It's muted, so it's not over the top, but it's noticed by some. (There's a name for the muted khaki patch, but I can't remember it.) Each vest has a couple of other patches, too, but they're meaningful to me; they make the vests non-threatening, non-military.