I can’t say this often enough, the mic is never off.
Here is one more example of someone getting in trouble because they said something when they thought the mic was off. Never, never, never, say or do anything you don’t want to whole world to witness, until you are totally off the set and have taken the mic off. Check out this link: http://elections.foxnews.com/2008/07/09/jesse-jackson-apologizes-for-obama-remarks