I believe I've mentioned the look before, but never as The Look. Sitting around a cab stand one night we were discussing how strange it is that some people just watch us drive by, saying nothing and making no hailing gestures, but then when we're several car lengths past, they'll shout angrily. It's as if they're willing us to stop, and then get angry when this strategy fails. Finally, somebody referred to this as The Look.
It's nice to have a formal name for a common, and comical, phenomenon. We often leave these people to their own devices, assuming if they're foolish enough to try to hail a cab with only their eyeballs, they're probably not going far and they're probably not big tippers.