Total inconsistency within the same game.
Of course, it's never going to be one of those things that Perera (or whatever his name is) will show you.
I remember watching NFL replay of the Pats-Ravens game and listening to him explain the controversial calls (3 of them), in the little window on the screen, and you can just look at a person and know when he doesn't really mean what he was saying, and that was him.
The NFL is totally inconsistent and it is biased to help certain teams over others.