How to use your whistle?

[crazy voyager]

I have to do one edit, I have once used multiple whistles and I think that's the only time.

If a fight breaks out, use many high long whistles, (perhaps a second long, then a short pause, another second and so on)

This is for distracting the fighters and bla bla bla (I think you all know it).

That's the only exception I can think off