Blocker Train

The fastest, longest "fuck you" on wheels.

An inconveniently-placed train that either threatens to get in someone's way or is already an obstacle. This almost exclusively happens when at least one person is in a rush and need a Plot Screw to slow them down, so God sends in a train to put a stopper in their way. If this is happening during a Chase Scene, it's more likely the chased is the one put behind the train than the chaser to intensify the sense of danger. If someone's Gotta Be Unlate, then a Blocker Train will only infuriate them and make them more likely to be late for whatever they're rushing to.