Dick Cheney's fourth branch

Just another though I had on the surreal argument about Dick Cheney's assertion that he constitutes a separate, independent branch of government. Apparently, Dick Cheney's theory is that because he has some legislative functions, as VP, he is outside the authority of either the legislative or the executive branch. I'm just waiting for someone to notice that the President signs bills into law, thus completing the legislative function, and starts to argue that he is outside the authority of the Executive branch.