I'm not scared of heights, don't get me wrong. I don't mind heights one bit. I am scared of falling however. I can never look over a cliff top and see the expanse of air and then the hard surface below.

On rollercoasters I don't look down, instead I look straight ahead and scream. I don't know why I'm terrified of falling off great heights; the more I think about it, the more anxious I get.