alt Hacker NewsErr...have you actually asked someone to get into a Cessna?
Also, "fear of heights" is a totally valid excuse. Fear is a gut reaction and may have nothing to do with one's justified true beliefs. Eg., I know spiders on probability won't harm me but there simply won't be any amicable co-existence between me and any arachnid.
> Err...have you actually asked someone to get into a Cessna?
Yes? In practice once you convince them to get into the plane the only real issue in the air for those new to flying is air sickness.
Also fun fact a good number of pilots claim to have a fear of heights (never met one irl except online in aviation forums).
If you are in aviation/aerospace, don't be afraid to share the joy of flying. There's nothing quite like cruising at 90-100 knots @ 3000-4000ft AGL on a nice clear day.