I love to watch the WSOP games when they're televised. It's so easy to tell someone what to do when you see everyone's cards when they're shown with a mini-cam.
But it's a lot harder when you're sitting at a live table. I will never forget the time I decided to play in a live poker tourney in Las Vegas.
There were two players at the final table who seem to know each other and one must have played in these tournaments a lot since he was acting cocky during his card play.
After I had re-raised him all in, he looked at me like I had slapped him in the face and then asked me if I knew who he was.
Then he told me he would show his cards if I show mine, and I agreed. He mucked his cards and so did I (after I won the hand).

There's a lot more to playing live poker than knowing how to play, it's also about keeping your cool around other poker players who've played the game a while.