Random bird

The other day I was driving nearby the house. The road I was on is a two lane road, not really a highway, but the speed limit is 50. The road is in a residential area, so driveways are right off of the road. I was in a line of about 3 cars and we were all going the speed limit. I saw a guy on my right walking from his house to his mailbox at the end of the driveway, but he was facing away from the line of cars. Then I noticed that he was giving the cars the finger as he was walking. We weren't speeding and we weren't making a lot of noise, just general car noise. I was so stunned by this that I didn't think to beep until well after I passed him and his bird. It was a weird sight.