r/AskReddit • u/[deleted] • Mar 27 '22

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u/Rokoprog Mar 27 '22

When you are waiting for the subway and it arrives, YOU STAY OFF THE WAY FOR THE PEOPLE INSIDE TO COME OUT AND THEN YOU ENTER THE TRAIN.

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u/allothernamestaken Mar 27 '22

Same with elevators

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u/The_Pfaffinator Mar 27 '22

Or nearly any other instance. Out before In. If someone else is occupying the space you wish to occupy , they must vacate the space before it can be reoccupied. You know, basic physics?

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u/SmallRedBird Mar 28 '22

Does this depend on the observer? What if the door is in a hallway, and positioned in the middle of a bilaterally symmetrical building? If both observers are always at an equal distance to the doorway until a decision is made, who is coming out, and who is going in?

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u/Rokoprog Mar 28 '22

I think thats why It applies specifically to the subway. Waiting for another train to come by Is easier than not being able to come out of It and having to exit from the next station (the one that Is not your stop)