As I driving on an interstate yesterday in the area of an airport, I saw over to my right a larger commerical jet flying in the opposite direction that I was driving. It was slightly angled up, so I took that to mean it was just flying away from the airport. I noticed how it just seemed to hang in the sky, despite its speed. I glanced over to my left another couple of times to verify what I had seen. Also, I have seen this at other times (other years, for instance). Have other users noticed this illusion of the aircraft hanging, as if it were on a cable? [itex]Edit:[/itex] Don't assume any headwind here. Suppose the aircraft were moving dirrectly overhead the vehicle (about 150 to 200 feet up) at 145 miles per hour, but traveling in the opposite direction. and you were driving 55 miles per hour. But the relative speed of the plane should be 200 mph passing you. The plane's length shouldn't account for it to be moving relatively slowly to you.