At the end of the first ever episode of "Friends" (the episode where Monica sleeps with Paul and Rachel leaves Barry at the alter, in case you forgot), Ross and Rachel are sitting in Monica's apartment. They split and Oreo cookie. Rachel is playing with her half (she never actually eats it) and in one shot she breaks it in half. In the next shot it's back into one piece and she puts it back on the plate in ONE piece. What is she, a magician? ;)