when you and someone else are going to pass each other in a corridor but you are both going the same side so then you change to go the other side, but the other person also does this, so then you go to the original side, but so does the other person......hopefully this does not progress for too long......but its definately a thing, BUT is there a word or phrase for it? there should be, because otherwise its a devil to write down the explanation.

Also suggest other 'things' that should have names.