This actually happened to me a couple days ago with an idiot motorcyclist. I was driving down the highway which is 80km/h, and to my left is an open lane and beside that lane on the left is another car.
Anyway, I shoulder check, and see nothing, all clear, so I signal. I guess I didn't shoulder check again really, well I was but at the same time I started turning the wheel since it was clear the first time. As I'm getting in the lane and nothing is happening, I turn my head forward and start driving normally, then before I'm fully in the lane I hear this honking (err beeping) from this idiot motorcyclist who's now riding inbetween me and this other car on my left.
InFUCKINGsane I was attracted yet repulsed by this movie. Their driving skills while highly dangerous were fucking good. You really have to know your car to make some of the lane changes they did. I'm glad I watched this from the saftey of my computer.