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Shel? Sheldon? No, no, you didn't have great sex with...Sheldon.
— Harry · When Harry Met Sally...

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This is a comic double take of disbelief. The speaker stumbles over a name, repeating it in rising alarm, as if saying it slowly might change what they just heard. The trailing pause before the name lands as the joke: the name itself is the surprise.
Context reviewed