Someone I know (not me, honest!) just had a minor collision with her car and another in a restaurant parking lot - she was backing out slowly, car came speeding past & scraped her bumper. They swapped insurance details, phone numbers etc. The damage to her car was very very minor - scrape on the bumper (the car was bought a little over a month ago). The other car was a '89 Jaguar :-/ The right rear fender is "loose" but apparently that was the only obvious damage. No police were called. Any advice for her? Who's likely at fault? What happens next with insurance companies & the like?