its so fun, but i have some fear of heights that i really want to get over. I did a 240 repell yesterday. i almost backed out, but once i got up there i felt anticipation, is that part of a fear of heights. i need to know cause me and my friend (he is totally insane) are going to do a 400 or 500(we dont know exact height) repell. how do i get over fear of heights if i have any at all.