A week or so ago I was biking through the center of my town, where the road is two lanes in each direction, but low-speed (25 mph limit) because it is a busy pedestrian shopping district. I was in the middle of the right-hand lane in order to avoid the door zone of the adjacent parallel parking. Cars could easily pass me by merging left into the next lane, or they could honestly just stay behind me because I wasn't riding any slower than the rest of traffic. As I approached one red light, I slowed to stop, and heard a female teenage driver in the car next to me say (not yell) "What the f*** are you doing?" Her windows were open, but I don't think she realized I could hear her, because when I turned to look at her and said "What?" she went stone-faced, turned up the radio, and stared straight ahead, like she was embarrassed and afraid to make eye contact with me.