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Next time, try to open your mouth a little wider when you speak.
— Willy Wonka • Willy Wonka & the Chocolate Factory

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker offers a pointed piece of advice about speaking: next time, open the mouth wider. The wording implies the listener was hard to understand, and the phrasing is brisk and corrective, though the words alone could be read as teasing or curt.
Context reviewed