the.com/double take

The brain's buffering screen when reality loads slower than your eyes.

means A delayed second look, after an initial glance, triggered when something doesn't register as odd until a beat too late.

from Theatrical and comic slang from early 20th-century stage and film performance, where a 'take' meant an actor's reaction shot to something onstage. A 'double take' was the deliberate comic bit of reacting once, normally, then snapping back for a second, exaggerated reaction — the beat where the joke lands. The term stuck in general English for that real-life lurch of delayed recognition.

origin
Coined in 1930s film and vaudeville comedy
mechanism
First glance misreads, second glance corrects, panic ensues
comedy use
Timing makes it funny; delay sells the joke
tell
Head physically rewinds before brain catches up
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