Sunday, October 24, 1999 Published at 13:05 GMT 14:05 UK
In pictures: Tyson's comic comeback
Mike Tyson gets in some verbal blows at a pre-fight press conference.
Tyson throws a punch in the first and only round of his comeback fight at the MGM Grand in Las Vegas.
Norris falls after Tyson hits him after the bell at the end of the first round.
Referee Richard Steele stands over Norris, whose right knee was injured in the fall.
Steele speaks to Tyson after the late punch. Boxing authorities are withholding Tyson's $10m purse pending a review of the fight. The 33-year-old heavyweight could still be disqualified.
A Nevada state athletic commissioner points out Norris' injured knee - the fight was declared a no-contest.
Norris is taken away by ambulance.