Corrected entry: In the scene where the panel falls, the lights are on right before it falls. But once it has fallen, in the next shot, the lights are out, without anyone touching them. They're on again once Buck Ace Cluck enters the room.
Corrected entry: When Chicken Little first takes the blanket off the panel, then he trips over it, when he picks it up you can see that it doesn't exactly match the floor underneath.
Correction: That's because he bumps it when he trips, knocking it off-kilter.
Correction: The scene goes dark to indicate that the panel hit Chicken Little on the head, not that the lights were literally turned off.