That happened to me too today! The car was in front of the crosswalk, so I went behind him, but then he went in reverse for whatever reason, and smacked into me - I think he had seen the runner coming and decided to get out of the way, only he was incompetent about it and hit the runner. Luckily, I dodged enough out of the way that I just sort of bumped into the car, but still, not a pleasant encounter.
Hope you thumped his trunk to let him know his folly. And that he missed - better next time.
I got knocked off my feet twice by cars when I lived in Japan for a year - people pulling out of hidden driveways onto the pavement without looking. Thankfully both times I had just enough time to get both my feet off the ground and ended up with some bruises.
I saw the world's most comedic low-speed car accident whilst there, too. Two cars arrive at a junction at the same time. Stop. Both jerk forward. Stop. Bow. Both jerk forward. Stop. Bow. Repeat until impact. They were still bowing when they drove into each other. Incredible.