Discription of Events: Road rage. Driver was upset that I let a bus in front of me and laid on the horn for about 10 seconds. Then he passed me and drove about 15 mph under the speed limit for a while to show he was mad. After we hit a two lane road and I tried to get around him, he swerved to prevent me from doing so and then he showed me either a real pistol or used his hand in the form of a pistol. I couldn't see since it was misty out. After that, he sped off and tailgated another car for about a mile.