Tiger Woods, Larry Bird, Wayne Gretzky, a pitcher just before a game, I would imagine they all have nervous energy. But as you perform, the nervous energy dissipates and you start to relax and you start to do what you do best.
It's hard to mix with a crowd when you're walking down the hallway and everybody else is a foot shorter. I remember hanging out with my friends, like at the mall, and thinking people were staring at me and talking about me. It made me turn inside myself. I became more shy and quiet.