Originally Posted By: picard120
lets assume the train car derail but the train remain upright with no damage to the walls.
Open the door?

If the carriage is lying on its side, you may have a problem. You can't open the door that the train is lying on, and the other door is now part of the ceiling and (in the UK) very heavy to lift. The doors that connect to the next carriage would be worth a try. If you have to break the windows, I'm not aware of any special technique beyond the usual.
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