So I'm in the middle of nowhere at a rest stop flying my quad when I hear a single engine plane flying at least >397' (my elevation) as it was higher. I then dropped my quad back to ground level until it passed. I went to fly again and soon the plane turned around, dropped altitude and headed back toward me. I thought it a coincidence because, surely he/she couldn't see me, but every time I brought it down and went back up (three times before I caught on), it would head right back for me. Once I kept it down, it left the area. Surely I must be misinterpreting the behavior but I can't see how. There was no farmland to dust, no animals to observe, just small hills, a few trees and lots of space.