Whistling is an underrated skill, one which, if executed ineptly, can be extremely annoying, but in the hands of an expert warbler can be a thing of wonder to hear.
Submitted for your approval, some of the most memorable whistles in the movies, stacked up by mood:
Twisted Nerve (1968)/Kill Bill Pt I (2003)
Bridge on the River Kwai (1957)
Django Unchained (2012)
Zazie Dans le Metro (1960)
The Morricone Triptych:
A Whistle before a-killin’: