You're riding your bike through traffic when you spot another biker off to your left. You look over, and he gives you a wave. You wave back and continue on your ride.

Minutes later, a car from your left nearly hits you, trying to merge into your lane. You barely maneuver out of the way as the car zooms ahead. The other biker seeing this takes off after the car. He gets right up to their window and is clearly making threatening hand gestures.

He eventually falls back to you, and you signal you are getting off the freeway. He nods and follows you off. You pull into the gas station and park at a pump. You look up, and he has already parked and is walking straight for you....