When I was a child I used to believe that the tracks jets made in the sky were from the tail fin of the plane scratching the top of the sky. Because of this I also thought those planes that did that were the "sky scrapers" people were talking about.
A childhood belief about aeroplanes

others believed things like this
- I thought that the jetstream from planes was white paint. Which was constantly poured out from the plane.— Tore
- I thought the lines in the sky left behind by airplanes were "sky scrapers". Makes sense.Anon
- I used to believe that the streams left behind jets were people going to heaven.— kindofadork
- i used to believe that the "fast lane" actually had some sort of tracks on it that made you go faster.— erin
- I once thought then when it rained God was crying and when it snowed he was scratching dry skin.— Karina
- if heavy people went on a plane i thought that it would tip over.— michael hague