The dude being filled with nitro lies in the coffin . Then Lawrence says Careful , he always had a bad temper , while 2 dudes load the coffin . Without nitro dudes just load up empty coffins and Lawrence doesn ' t board the train ? Or train carries empty coffins back and forth , these only get unloaded and reloaded when nitro is present ? I ' s possible you are 100 % right and the discontinuity is written in . It ' s hard to write foolproof loops and an interesting movie at the same time . For example at the end of Ep 7 Ford and Bernard leave the room and turn off the light . But the body of Theresa still has to be carried out . It would make more practical sense to stay there , wait for the helper hosts arrive and finish up .