I saw psycho and had nightmares for years. I was working in some cranky womans house rather too close to her tv set and she had texas chainsaw on which was hideously frightening, I could not wait to get out. I also walked out on a film which started off normal, and then suddenly became a terrifying horror half an hour later. I will never knowingly choose to watch a horror movie. I remember (like Peckhamgatecrasher) the scene in Great Expectations, when the convict grabbed Pip it turned my stomach, and it was classed as a 'U' I dont remember what age I was, but definitely far too young.