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Keep your distance though, Chewie...but don't look like your tryin' to keep your distance. I don't know...fly casual.
— Han Solo · Star Wars: Episode VI - Return of the Jedi
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The instruction asks for distance without making that distance look deliberate. The speaker struggles to explain how to achieve both aims, finally settling on flying casually. The humour comes from trying to make a carefully controlled manoeuvre appear entirely unplanned.
Context reviewed