Today I called the cops...

[shark]

I experienced something similar quite a few years ago. I was walking down the street late one night and noticed a suspicious car (Ford Taurus) parked with the interior light on. I walked past and kept going, when I noticed that they pulled away from the curb and began tailing me for a bit. I kept walking along casually and finally they turned around and left. They weren't delivering newspapers or anything. Weird.