When Casey is in the closet in the faculty room, the woman teacher, who is talking to the coach, gets water from the water jug and splashes it on her face. The camera cuts to her so you can see her face, but her hair is perfect and there isn't any water anywhere. See more...
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The Faculty (1998) - 1 easter egg
Easter eggs are hidden bits on DVDs which if you know where to look can provide all sorts of fun extras.