I remeber still back when Alien was in the theater. I was child sitting with my hands over my face, had nightmares for months.
To this day I still have aquaphobia. Not sure if its from the JAWS movies but I can't even jetski in Folsom Lake without having thoughts of some huge shark fin surfacing along side me. At that point I get all squirrly, wipeout and have a panic attack swimming back to my ski... not cool.