Multiple Mirror Effects in Movies

The Phantom of the Opera (1925)

Spoiler Alert !

Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
 
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After the Phantom abducts Christine and takes her to his underground lair, two men trying to rescue her fall into a room lined with mirrors that the title card calls "...the room of many mirrors - - the old torture chamber!" When the Phantom discovers them, he turns up the heat to force them to leave.