Had something like this happen today and it reminded me immediately of this thread.
Working trail frontcourt, ball OOB, I go to put air in the whistle, and.....spit the whole darn thing out of my mouth without making a peep. So, channeling BNR, I yell "Whistle, whistle, whistle!"
Relatively quiet gym, so the timer picked it up and got the clocked stopped within a second. I owe her one.
That was a first for me.