I had a similar encounter with what looked like an ordinary flesh and blood person who similarly vanished. I was out for an early morning jog along an empty road in an undeveloped area. So there was an asphalt road but no buildings, only city block sized patches of dirt, rocks and weeds. I suddenly noticed another jogger running towards me and was surprised I hadn't noticed him earlier since there was absolutely nothing to block my vision for at least a half mile in any direction. As we ran past each other I said "Good Morning" and he obviously hadn't noticed me either because he turned and looked absolutely shocked to see me. His eyes went wide, looked at me them my clothes then looked me right in the eyes as we passed each other. I held eye contact with this guy for those few moments from about 3 feet away. I stopped and turned around to apologize for scaring him only to find that there was nobody there.