I genuinely suffer from ptophobia ( fear of falling). I suffered from a very painful and damaging fall when I was younger. This movie had my stomach flipping, my body twitching and gave me genuine scares throughout. I can honestly say if you suffer with a fear of heights or ptophobia this movie is genuinely going to scare the living b'jesus out of you. I can't describe how scary it was for me. Watch it for the sheer thrill and the stunningly amazing cinematography. It's stunning.