I was probably 150 feet away too. But from the moment I drove into the parking lot, that guy kept his eyes locked onto me. I actually drove away because I didn't want him looking into the camera (he couldn't see any camera, I was simply in my truck). When I circled around (leaving his ability to see me) he was looking out already. So not sure if he was really looking at me, or just looking out.
Anyway, I took the photo because after a couple of minutes of me just sitting there and I wasn't looking at him, he never stopped looking out. So I took a few photos because I didn't want to lose it. I then left, circled around and when I came back 5 minutes later he was gone.