Remember Rutherford B. Hayes's public shouting match with Tennessee Representative Benton McMillin on the floor of Congress during the fall of 1880?
Of course you don't! (1) Because I made it up. But a far more important (2) because it was never captured on video!
You can't just go shouting "You lie!" at the President of the United States of America during a nationally televised address and expect it NOT to end up all over the Internet, as South Carolina Representative Joe Wilson has learned the hard way.
I guess it could have been worse. He could have shouted out his ATM pin number. Or shouted out that he had been cheating on his wife with a lobbyist.