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From: Ross Clark <benlizro@ihug.co.nz>
Newsgroups: sci.lang
Subject: "Jaws" released (21-6-1975)
Date: Sat, 22 Jun 2024 22:39:13 +1200
Organization: A noiseless patient Spider
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Spot the language link?

....
"the 2-note ostinato which represents the shark, a theme so simple that 
Spielberg initially thought it was a joke by the composer [John 
Williams]...a classic piece of suspense music, synonymous with 
approaching danger...highly recognisable..."

https://en.wikipedia.org/wiki/Jaws:_Original_Motion_Picture_Soundtrack

and, as Crystal points out, used not only in other films (often with 
comic intent), but quoted in conversation, to signal "approaching 
danger"...thus becoming (sort of) part of language.