It does not matter if he was in an elevator or on the dark side of the Moon, he remains an officer of the court and it is just as impermissible for him to verbally attack members of a jury as it would be for him to insult the judge. There are strict codes of propriety that this guy signed on to when he was admitted to the bar, and they are in force 27/7, not just when he's in the courtroom.
Would you please post the authority for your statement.