I can honestly say this film gave me the hebee jeebees like crazy. The higher they climbed, so did the anxiety. Thing about it is, I was a U.S. Army paratrooper for 6 years. I'am used to heights. Standard drop altitude was 1,250 ft. (static line). But we were were always on a moving platform, airplanes, helicopters. Being stationary on that little round platform at the top, that is a different animal. Great movie overall.