the movie is about a third eye type thing in the brain that can be activated by some sort of a device. a man is driving & thinks about an event that happened in a house; two people put on the third eye device & then they are able to see previously invisible creatures floating around. one of the creatures - a giant fish like creature - looks at one of the guys, then swoops down & bites the dude's head off, the man dies.
OK, let me know if you know the title of the movie that contains those scenes. thanx, & happy holloween!