Some time ago I was first in line at the left turn lane, waiting for the light to change. As it did, there was a car approaching the limit line at the street I was turning on to, and it was not at all clear he intended to stop. (I seem to be in the minority of drivers who check before entering the intersection when the light changes). As the guy locks up his brakes, the jackass behind me leans on his horn (I'm sure he didn't bother looking anywhere but the light.) No one was behind him, and I was sorely temped to just sit there and smile at him through the whole green light, or pretend my car died, then scoot through on the yellow. But, that's not nice (and it is how people get shot).