I love when famous people don't take themselves too seriously, especially those who play characters that are stoic and are very reserved emotionally. Take for instance Morgan Freeman. Freeman's movie characters and unmistakeable voice are pretty much just as I described. Even his hosting character on "Through the Wormhole with Morgan Freeman," which you'll find on the Science Channel, is pretty straightforward. So it's refreshing when actors come out to play.

Recently, Jimmy Fallon had Freeman on the Tonight Show and had him do the interview with lungs full of helium. The result was hilarious.