Yes, Dave you got it all right. He went to the wrong side, and, presumably, pulled right out in front of the car as it tried to go around. And I love my mirror, too--would not ride without it.

I neglected to address the driver. Although probably not to blame, he/she is a major (insert expletive) for driving away, not helping the fallen cyclist. I would bet they did not have insurance, or had some prior violations, maybe DUI(?). No excuses for them, though.