If I'm butter then
He's a hot knife
He makes my heart a cinemascope screen

from Fiona Apple – Hot Knife Lyrics on Rap Genius

Meaning

He cuts through her like a hot knife through butter. He cuts straight to her core. Maybe she’s finally found someone that makes her feel something.

http://www.youtube.com/watch?v=o_DAQJRanVs

CinemaScope was an anamorphic lens series used for shooting wide screen movies from 1953 to 1967. Its creation in 1953, by the president of 20th Century-Fox, marked the beginning of the modern anamorphic format in both principal photography and movie projection.

Bird of Paradise is a film from 1932, (remade in 1951), with several extended dance sequences. Not quite the right timeline for being filmed in CinemaScope, but still interesting.

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