I had a woman cut in front of me to take a left hand turn into an apartment complex. I went after her when it was clear she was headed into a nearby carport. She apologized profusely. I told her if she had used her blinker I would have seen it and slowed down. And I was in the right hand lane where drivers aren't always looking for cyclists approaching from the rear. I cautioned her that using her blinker even even if she thought there was no one there; the other person can react to your blinker and avoid a bad situation.

I didn't yell, but I told her she scared the daylights out of me.