I never understand when a camera goes to a section across the field for a split second, the fans know they're on tv for that short amount of time and wave to the camera. I'm busy watching the game when I'm at the ballpark. I'm not talking about the fans behind home plate who know they're always on tv. The wave is the same way. I'm busy watching the game and not worrying about where the fans are getting up in unison around the stadium.