Susan Pevensie: Lucy thinks she's found a magical land...
Professor Kirke: Hmmm.
Susan Pevensie: In the upstairs wardrobe.
Professor Kirke: What? What did you say?
Peter Pevensie: Our sister... She thinks she's found a wood...
Professor Kirke: What was it like?
Susan Pevensie: Like talking to a lunatic...
Professor Kirke: No, no, not her, the wood!
Susan Pevensie: You don't mean you believe her?
Professor Kirke: And you don't?
When Mrs. MacReady meets the Pevensie children at the train station, the reflector screen is reflected in the lenses of her glasses, as she looks down when she speaks to them. It is also visible when the children first arrive at the house, when Mrs. MacReady says, "There shall be no disturbing of the professor."
When Lucy finds Narnia the second time, the "wind" that blows out her candle is a crew member inside the wardrobe trying to blow the flame out.