From: benlizro@ihug.co.nz   
      
   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.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)