Right before the kids go off to there secret party there are two girls in there room. Michele Williams and some other girl are watching Scream 2. This doesn't make sence because in the first Scream they are watching Halloween, so this would mean that Michale Myers is just a killer from a movie and none of the people involved are real.
Denpeck, you're good! I never would have caught that. That's so cool how the movie's contradict themselves. And Angel, try reading the slip-up again and watch the movies. And then if you can't comprehend, seek help.
What's important here is that you watch both movies. in Scream 2, the guy keeps saying, "behind you!" and if you watch the screen, you can recognize that it was the stairway scene from HALLOWEEN 1. yes, the original one by john carpenter. So this is actually accurate.
First of all, this isn't a slip up, it's just the producers, etc. being funny. If you listen to the carefully while watching H20, it's not really Scream they are watching...they call the girl CiCi, not Sydney. They are making fun of Scream.