A curious incident of a Ford in the nighttime

The scene: a parking lot outside of a combination McDonalds/Chevon at approximately 11:30 Friday evening.

I had just finished babysitting and was supposed to meet Kim (the girl who is subleasing my townhouse) outside of the gas station to hand over my key. I pulled into the parking lot and parked next to a black Ford truck. A guy (about my age I'm guessing) was sitting on the passenger's side and he had rolled the window down slightly and was staring at me. I tried to ignore him and he eventually rolled the window back up. I locked the doors.

About 10 minutes later he cracked the window again and peered out at me. I smiled at him and pretended to be doing something in my car. By the time I glanced at the truck again the window was closed. I wondered if I'd brought my pepper spray home from school.

When I looked back the next time this guy's black eyes and floppy hair were peeking through the cracked window again. As soon as he caught me looking at him the window began to unroll slowly. I never saw more than his eyes and the bridge of his nose though, because his head went down right along with the window. I laughed, called Kim, and drove away.

What kind of guy sits in a parked car outside of a McDonalds/Chevron at 11:30 at night? What kind of guy plays with a girl via his automatics? The creepy kind of guy would be my guess, but then again, he could have just been bored while waiting for his sublessor too.