Mark: I'm telling Mom and Dad. You're in big trouble.
Randy: Hey, they're not your mom and dad. They're aliens too.
Mark: Are not.
Randy: Are too. Our spaceship's coming to pick us up tonight.
Brad: Yeah. And we're gonna leave you here all alone for the rest of your life.
Mark: You don't scare me. [runs away]
Randy: Hold it. You better walk backwards until after we leave tonight.
Mark: Why?
Randy: Because aliens can't suck your blood if you're walking backwards.
Brad: Yeah. Our real lips are in the back of our heads.