I should also mention that, according to my aunt, the person who hit my uncle didn't initially stop -- he stopped shortly after (seconds? a minute?) when he was flagged down by another driver who saw it happen. So either 1) he wasn't aware that the accident had happened, 2) he thought it was a dog/branch/pothole/whatever, 3) he was trying to get away but realized that wasn't going to work, or 4) he was stopping, just hadn't stopped yet, or 5) something got lost in the translation.

Either way, I'm glad he stopped.