To answer your question, no.

But when I was going through paratrooper training in the Army we had to jump out of a 35 ft tower all rigged up to a zip line. I asked why it was 35 ft and they told me they had done studies back in like WW2 that 35 ft was the magic height:any height above and all you know is you're high up in the air (like ridingin anairplane and looking out the window, it just doesn't register), any height below you'll freak out if you're scared of heights.

I don't know if its true or not, just passing on what they told me.

Ken