Revealing mistake: During the scene when Cindy and the killer are fighting Matrix-style, Cindy kicks the killer, and he knocks down the book case so it falls over him. There is a vase with flowers on the book case - when it falls down the vase still remains on the book case, glued to it.
Revealing mistake: During the final party scene, where Cindy is wearing a Viking Hat and yells with joy as she drinks from a "Beer Bong", if you look closely, right before they pan to Cindy, you can see that the hose of the "Beer Bong" is not attached to the funnel, or anything for that matter...it is just held alongside it.
Revealing mistake: In the scene where Greg and everyone are doing the "I Know What You Did Last Summer" parody, Greg has a Jack Daniels bottle. After Bobby turns on the music Greg pushes himself up to the sun-roof. If you watch carefully the bottle bends as he pushes himself up.
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