Yep, happened to me. Was driving down my road (is very long and windy) too fast considering it was raining. Parked cars all the way down one side, and then a bus came up the other side of the road. Slammed on the brakes and went straight into a brand new focus. I would never have just left it, so I knocked on the door of the house that it was nearest too, and spoke to the man whose car it was. He was lovely about it, and even apologised for parking there (which was ridiculous, he has every right to park on the road, and it was me driving too fast). Left all my details and stuff, I would have left a note if nobody was in. His car just had minor damage but mine was ruined (for the 2nd time that fortnight). Tbh, I would never have driven off in a million years. Firstly, considering I live in a very busy, residential area it would be stupid, cos chances are someone would have seen me. Second, and more importantly, its a matter of principal. I would go mad if someone did that to my car, its only fair to own up and take responsibility.