Yeah, I know what you're talking about, happened to me a few times. Once I got distracted by someone in the car and blew a red light, good thing there were no cops around. This guy I know (drives a Honda Accord I think) was going about 30mph, saw a girl that he knows on the street, slammed on the brakes and when he slowed down to about 10-15 mph, he shifted it into Park (he thought he stopped already). He said the made this really wierd and loud noise. My guess is that his wheels stopped completely but I don't know, I wasn't there. After he finally stopped, he realised it was some other chick. Maybe he's lying but it was really funny when he told me the storry, I just couldn't stop laughing for a minute or so.