John Barnes has lifted the lid on Mark Viduka's infamous meltdown when they were together at Celtic. Celtic were crashing to the most humiliating result in their history back in February 2000 as Super Caley went ballistic in the Scottish Cup.
Emotions were running high in the Hoops dressing room during the half-time break - and eventually it all boiled over. Barnes told BBC Scotland: "He got into an argument with Eric Black, he took his clothes off and said he wasn't going to play.
"He refused to go out. So I said 'if you're not going to go out, fine'.
"Eric Black had questioned his attitude so he took his boots off.
"I said to Mark, 'what are you doing?' He got in the bath so I had to make a substitution. When I went to see the chief executive afterwards, because it was a plc, everything had to be positive.
"It was about projecting the right image.
"I went to see the chief executive and asked what was going to happen.
"Are we still together on this, am I going to tell them what happened at half-time?
"I kept the party line but then everything came out. It was the game that broke the camel's back."