Sidney Prescott: You sicks fucks have seen too many movies!
Billy Loomis: Sid, don't blame the movies. The movies don't create psychos, movies make psychos more creative.
Randy: There are certain rules one must abide in order to sucuessfully survive a horror movie, rule number one, you can never have sex.
[Everyone jeers.]
Randy: Big no-no! Big no-no!
Stu: I'd be a dead man.
Randy: Rule number two, you can never drink or do drugs. [Everyone clacks their beers together.] It's the sin factor. An extension of number one. And number three, never, ever, under any circumstances say "I'll be right back." Because you won't be back.
Stu: Hey, I'm gettin' another beer, you want one?
Randy: Yeah, sure.
Stu: [Dramatically.] I'll be right back!
Randy: Yeah, you bent the rules. I'll see you in the kitchen with a knife.
Principal Himbry: Damn little shits!
Janitor: What'd you call me?
Principal Himbry: Not you, Fred.
Ghostface: What's your favorite scary movie?
Answer: Characters in horror movies are notorious for not doing the most obvious things. It's most likely that she was scared and not thinking straight at receiving numerous threatening phone calls, particularly when she is threatened after hanging up on the killer.
Manky
Also, when she told the caller that she was "two seconds away from calling the police", his response was that they'd never make it in time. She also knew he was nearby as he made comments that indicated he could see her. She didn't know it was someone that knew her. She's a teenager and scared, so her judgement was clouded. She reached a point where she believed her only chance was to get away from him by either fighting him or getting out and hiding somewhere outside.
dewinela