In the episode where Reese is going on a date with his new girlfriend (the one who uses the pepperspray,) watch when Reese tries to convince Lois' boss to take them to the concert.

Reese takes a whole pie out from the oven, and puts it on the table. Lois' boss asks him if it has any fingernails in it. The camera angle changes, and you can see half the pie is gone, and there isn't even a knife or fork on the table! In the next shot, the whole pie is gone, and then appears again!