I had something like that happen to me a couple months ago. I just left Walmart and was sitting in my car still in the parking lot checking something on my phone. Next thing, I hear somebody knocking on my window. I cracked my window just to see what he wanted and all he wanted to tell me is I had a nice car. In the guys defense, the guy seemed like he probably had Asperger's and was fairly low functioning so he probably couldn't help it from coming out very awkward. I have Asperger's myself, but I'm high functioning and I know we can come off very awkward sometimes but this guy was definitely a case where the lights were on, but nobody is home.