According to Jim

Cheryl starts to feel taken for granted as she prepares Thanksgiving dinner. She suffers the ultimate insult when she gets stuck on the roof after retrieving her tablecloth that Jim had fashioned into a ghost for Halloween, and no one notices her absence until she unhooks the satellite. To apologize, Jim tells her that he, Dana and Andy will prepare the dinner. Jim never thinks that Cheryl, being the control freak that she is, would allow that to happen, so he doesn't make dinner. Unfortunately, neither does Cheryl.