Continuity mistake: In the scene where Sydney and the dorks are giving out free drinks and burgers Dinky comes up to her and begins talking to her. Just after they show the green soy burger, Dinky is to the left of the shot parting her hair: this immediately switches to both her hands down in the immediate following shot. A couple shots later you see the parting the hair shot come back into play at a different angle.
Continuity mistake: In the scene when the girl comes up to Rachel to tell her she's lost five pounds, Tyler starts calling Sydney, Rachel mistakenly starts waving to Tyler. From the front view her hand is up, but from the back view of her she is starting to put her hand down. In the next shot, it's up again and she's just now starting to put her hand down.
Continuity mistake: In the scene where Sydney and the dorks are giving out free burgers to gain support for the election, Rachel comes up to her and begins talking to her. When the camera is on her, the necklace clasp is visible, and in the next shot, it's not. It's position changes throughout the scene.
Continuity mistake: When the guys are invited to the party, Sydney is wearing a heart necklace at the party. When they go back to the condemned vortex, her necklace is different and the claps is showing. Then the clasp is still showing and is a bit lower, then it isn't showing.