I was in a bike lane approaching a low-traffic intersection where the majority of the traffic turns left. I was also going to turn left, so I looked back and a car was approaching rapidly. This was pretty normal, and I figured I'd pull in behind the car before getting to the stop sign. The bike lane stripe becomes broken approaching the intersection, and, in the absence of traffic, I usually move into the lane where the solid stripe ends.
However, the car pulled next to me and slowed to my speed, and the driver yelled, "Signal!" at me. The car kept me blocked in the bike lane as I reached the intersection, so I looked at the driver after stopping. He was looking and me and threw his hands in the air. I didn't know what his problem was, and didn't want to deal with him, so I cut in front of him and turned left.
Moments later, he went by and yelled, "Signal!" again. He sounded really frustrated.