The 'Scream' movies were the first of their kind, breaking all the rules by brilliantly revealing them to the audience:
1. Never run up the stairs when being chased by a knife-wielding psychopath.
2. Don't have sex or engage in debauchery of any kind.
3. Never, under any circumstances, utter the phrase, "I'll be right back." Cuz you won't be.
4. Don't answer the phone.
5. Most importantly, don't befriend Sydney Prescott -- people in her life tend to end up dead.
Bearing those rules in mind, sit back, relax and enjoy as the body count racks up.
Warning: Major spoilers after the jump, and suffice it to say, NSFW!