Moonstruck - A Bendable Wooden Thumb?
In the scene where Cher and Cage are in the street after the opera in front of his apartment, he holds out his wooden hand for her to take. Watch very carefully. They do a close up of her grabbing his hand and you can see his thumb bend over hers. It was his wooden hand because throughout the movie, it was his left hand and this is his left hand that accidentally bends.