Corrected entry: When McDermott is being 'engulfed' by the black plastic chair, you can quite see him pulling it down on top of himself.
Corrected entry: The only surviving Nestene control sphere has changed colour. It was previously red-pink but is now light blue. Except in the scene where the Master brings the first Autons to life, when it is pink...
Correction: The Nestene sphere is light blue because it is inactive, it becomes pink when the master "wakes it up".
Correction: This scene was actually shot backward to create a realistic-looking struggle. So in no way is the actor pulling the chair onto himself but he is legitimately pushing it away.