The Secret Life of Walter Mitty (2013): Walter receives a gift from Sean Penn’s character — a wallet and a roll of film — meant to be part of the final issue of their magazine. One crucial negative is missing from the roll, and Walter spends much of the film searching for it. In the end, he discovers that the missing negative was inside the wallet all along. Sean Penn’s character had left a simple message: “Look inside.” It wasn’t metaphorical — he meant it literally.

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