I've seen it happen so many times. Two vehicles are stopped at a traffic
light, one behind the other. The light turns green and the first car
doesn't notice and so doesn't move. The vehicle behind gives the car a
quick honk to inform the car on the light change, and in turn gets flipped
off for doing so. A horn is not just a rude gesture people! They were put
in cars in the first place as a form of communication. You were the one not
paying attention, and yet the person honking is the ***hole. Grow up!