This is something to learn, albeit from a bad source.  The next time you’re watching TV, turn the sound off.  Now just watch the person onscreen.

You’ll be amazed at how much “over the top” acting is evident.  Exaggerated facial expressions; flamboyant, overstated physical movements; “surprised” reactions that almost look like you’re watching some ancient silent movie.

(Sports broadcasting is a playground full of stickers, too.  Carefully coifed announcers and ex-athletes, stiff as a board up in “the booth” like they were shellacked to the wall.)

Here’s the lesson:

The same thing happens in radio, when people can’t see you, but can hear you.  Watch out for verbal overacting.  It shows.

The object is to be as natural-sounding as you can.  The more you you are, the better you you’ll be.