The Faculty (1998)

Continuity mistake: When Casey is walking up to the school after his father drove him there, we see that Casey's bag strap is backwards. Then they cut to the car, and when they cut back to Casey and all of a sudden, his bagstrap is turned the right way. The next cut is when coach Willis and Casey's father look at Casey and then Casey starts to walk up to the school again and his bag strap is turned backwards again.

Coach Willis: You're not much into sports.
Casey: I don't think that a person should run unless he's being chased.
Coach Willis: "Being chased." I like that.

Trivia: In the beginning of the movie, Marybeth asks a girl with a piercing where the office is. That girl is actually the director Robert Rodriguez's sister, and she has a tattoo in the same place where George Clooney had in From Dusk Till Dawn, another of Rodriguez's movies.

Question: In the scene where the main characters are talking about their peculiar behaviours i.e.- "Stokely, since when did you start liking boys" and "What, Delilah, you haven't gone without hairspray and contacts since birth". Can anyone please tell me what Delilah means when she says to Casey- "And Casey, since when did you become Sigourney Weaver?" I have never understood what it means but I think it might have some reference to the movie "Alien".