They are trapped, and I will free them. Not because I care about their freedom, but because I, too, am locked in their cage, and it will be a more comfortable prison without their presence. Two stops to go, which means the next is mine, so I rise and ready myself, forgetting my briefcase below the seat. My coat peels slowly off the insterile plastic seat cushion, and I unconsciously smooth it out and shake off the unshakeable filth. I've done this a dozen times in a half-dozen countries, and it's always just as easy.
Nobody ever notices.
You just step off the train with the crowd, blend in with the scenery and you're gone, and they can't ever stop you, not ever. They can check hours and hours of videotape, they can ask witnesses for testimony, they can bring dogs in and wave magical fairy dust if they like, but they can't stop you, because they don't know who to look for. Fifteen seconds later, the doors seal shut and seal the fates of those still aboard, but I'm well on my way back up into hell by the time the train pulls away for heaven, ETA 30 seconds and counting. I don't believe in it, really. I think we pretty much all hold our own cards, and choose our own fates, or the fates of others, as the case may be.