I am fairly well equipped with tools, and I will probably take a picture and post so you can get a clue. I have a ratchet set from MEC and a Topeak MTB tool box that includes a chain breaker, a Park Tool spoke spanner, a cassette lockring tool and a chainring bolt tool.
I am probably a little over-equipped with the ratchet set, but it is really handy when assembling and disassembling bikes at the airport, whereas the hex keys in the tool box are handy for on-road tweaks.
From what I saw of Machka's accident, when she tripped, the rear wheel of the bike slipped down off what was three steps up into the train (ie, we were manoeuvring the bikes up around 2-1/2 feet off the platform) and it dragged her with it. I think her knee hit the front wheel which was sideways, and collected the brake and moved it over against the headlight and front mudguard. The other knee ended up on the wheel, and the force was enough to shift the QR and axle out of the dropout on one side.
The Thorns didn't come with lawyers lips, and that is probably what helped saved any more severe damage to the wheel other than putting it out of true slightly. The return spring on the brake arm popped out, I put that back in, put the light and mudguard back in their proper places, and eased the cable off on the brakes because the out-of-true rim rubbed slightly.
Machka did some research on emergency numbers and any reciprocal arrangements with Australia on Medicare (our national health scheme), and so on, and put all that and a whole lot of other information on a huge spreadsheet which we have somewhere. The emergency numbers do change substantially between countries, so ours at home (000) or the North American one (911) are useless.
We also have a pretty good travel insurance policy, and we wouldn't travel without it despite the cost for this trip.
Anyway, there were plenty of people around should it have come to that.
The irony was that on another train that formed the first leg of the trip, we were lectured like schoolchildren about how we had put the bikes in the wrong carriage and that next time, we were to take note of... blah, blah, blah.
So we get to the connecting train and some jerk had put three of the hugest suitcases you'll ever see right in the bicycles-only part. It was entirely his fault that Machka was hurt, because he refused to move the cases to give us more room (well, until Machka got hurt and I started to get that murderous look in my eyes). And, no, I didn't swear.