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Up the airy mountain, down the rushing glen, we dare not go a hunting, for fear of little men! You see, nobody ever goes in and nobody ever comes out!
— Tinker · Willy Wonka & the Chocolate Factory

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The lilting mountain-and-glen rhyme makes the warning sound playful, but fear runs through it. Little men turn a possible adventure into somewhere people dare not go. The final insistence that nobody enters or leaves gives the place an eerie sense of being sealed off.
Context reviewed