Rachel: A fucking 'Facebook' killer... You're kidding me right?
Chloe: I guess now it would be Twitter, that'd make more sense.
In the final shot of the film, Jill's head moves slightly when she's supposed to be dead.
In the beginning, one of the girls mentions how bad the Saw series is. Erik Knudsen (who plays Robbie Mercer) was in Saw 2 as Matthew.