Funny, isn't it - looking at the parallax on the Sony Building, it looks like Francesco is still some 20 or so stories up but the viewpoint makes it more comfortable for you. I never used to have any problem with heights myself when I was younger but I do a little now - not enough to stop me from going to the Empire State observation deck on the 86th floor and taking photos straight down, but enough that I'm glad of the parapet and fencing! Looking at a photo doesn't concern me at all though, and neither does flying - lucky, given I was commuting by plane twice a week a while back.

Maybe, for Darren's sake, you can come up with some sort of shorthand for the especially vertiginous photos - an (H) for high or something :)