That's how a professional or other seasoned speaker checks to see if the "mike" is turned on. Way cooler than "Testing, testing, 1, 2, 3." Disk Jockey 101.
36 posted on 09/27/2016 3:54:51 AM PDT by Ace's Dad
(Happiness would be command of a battery of ballistic missile interceptors or an Aegis cruiser.)