No question the car was in the wrong, but in typical city traffic you're gonna see probably at least one similar move (or worse) frequently more than once in a day, you gotta be ready for it. No move any car makes in city traffic surprises me any more, many people driving around seem to not even realize or even care how their actions impact others.
Accidental stuff I can deal with, but this was probably more of a lack of concern on the part of the driver, rather than accidental, which I find troubling, but also provides a convenient excuse to get myself a nice expensive video camera.