I always wondered what it would be like if you came in contact with someone that had the exact identical turn taking response reaction as me. How awful it would turn out to be.
I would try to take a right to pass him, and he would try to take a left to pass me, and we would bump into each other. Then we would both try to say OK. you take a left.. erm.. would be quite catastrophic, until we both turn around or something... I don't know..