Continuity mistake: When Chelsea drinks all the punch, you can see that her face is soaked. The next shot you see of her, her face and hair are dry.
Other mistake: Eddie and Chelsea begin sharing notes in class. After Raven has picked it out of the trash, she reads what Eddie and Chelsea have put. Chelsea says, "Can't wait", but how could she? Eddie threw the note and it didn't reach her, just the floor, so Chelsea never read it nor make a reply.
Continuity mistake: When Cory is talking to his dad about not trick or treating with him, look at his barbell. The number "one" written on it keeps appearing and disappearing between shots.
Visible crew/equipment: When Cory is telling his dad that he doesn't want to trick or treat with him anymore, you can see studio lights in the head mirror that Mr. Baxter is wearing around his head.
My Big Fat Pizza Party - S2-E21
Visible crew/equipment: When Raven is making snow angles in the giant pizza, watch as Chelsea says, "They're beautiful!" There is a very visible boom mic.
My Big Fat Pizza Party - S2-E21
Continuity mistake: When Chealsea and Raven are making the giant pizza, the pepperoni slices Chealsea throws on the pizza are normal sized, but when they come into the dining area they are giant.
Answer: Psychic ability run in Raven's family, while the abilities skipped a generation with her mother, her Grandmother Viv was also a psychic.
OneHappyHusky