Adulting: Step 304: When there is a small, confined space that some humans are leaving and others are entering, the leaving...
This is pretty simple but really seems to confound some folks.
If you wish to enter a subway car, an elevator, a bus, an alcove - whatever small but key space - let those who wish to leave that same space do it first.
You see, human beings have mass, and take up space in the universe….