James Toney vs Ernest Mateen
"That's the best thing I've ever seen in boxing... (Toney) didn't try to retaliate with punching behind the back and hitting below the belt. That's what you call a champion... Those punches behind the neck like that, it's going to take him two years to recover from that." - George Foreman during the broadcast about the disqualification.
The disqualification was decided at 2:59 of round 5.