What is Cheney Trying to Hide?

We have known for quite a while that Dick Cheney is untrustworthy, but this video clip from a recent Bush press conference makes him seem real shady. Is he being the puppet master pulling Bush’s strings? Is he trying to make sure that Bush doesn’t screw up Cheney’s Darth Vader like plans for world domination? Or is he just afraid that Wolf Blitzer is going to jump out and ask about his pregnant lesbian daughter?