This slip up occurs in the episode Big Little Man. Bobby asks Greg if he can help him fix the girl's bedroom window. Greg says no and goes inside to answer a phone call. Bobby precedes to climb the ladder to fix the window. The ladder slips and Bobby is hanging from the window outside. Greg is upstairs and he dashes into the girl's bedroom to pull Bobby inside. Watch as Greg enters the room. Marcia's stuffed animal is sitting in the middle of the bed. A second later, it has mysteriously moved to the end of the bed.