Ah... I got it. I think. The guy stops at the sign. He looks at the sign. It READS "Stop" but it SAYS "Go". So what's he doing? He's driving. KA BLAMM. And the sign stands there like "'s not my fault, moron. "
However, the positions of car and sign are clearly defined, the car is standing to the left of the sign, and the guy looks out to the left, too. So he's probably looking for traffic. If so, I'm really to blind to get it. D: