Jhan Mjallby has finally lifted the lid on an infamous night of shame at a hotel after a Glasgow Derby win and admitted to urinating in a pint glass.
The former Celtic hero has published his autobiography in Sweden - 'I gave everything I had.'
And he's lifted the lid on a scandalous night of partying 24 years ago after a Player of the Year awards, which was held on the night after Celtic had just won 3-0 at Ibrox against Rangers in a match where Henrik Larsson scored his 50th goal of the season.
Mjallby, who is now 54 and won eight major honours with the Hoops in a six-year spell, revealed the incident led to Celtic fining him a whopping £40,000 back in 2001.
He wrote: "It was a gala event night at the Thistle Hotel in Glasgow. We won against Rangers 3-0 away, at the same time that Henrik Larsson was awarded Player of the Year and Stilian Petrov as Young Player of the Year.
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"It's easy to understand that the whole squad was ready to go hard at it that evening. And it went crazy.
"After the TV cameras were turned off, we continued to celebrate, including with striker Chris Sutton and goalkeeper Jonathan Gould.
"We drank beer and, in a moment of childishness and carelessness, Gould and I decided that the toilet was a bit too far away and chose to relieve ourselves in a small room near the hotel kitchen.
"Gould peed in some kind of flower pot while I peed in a glass, which I then put away.
"Of course, it was stupid and despicable behaviour and it didn't get any better when we were caught by the head chef.
"Chris Sutton and I were told to leave even though Chris had done nothing.
"Jonathan Gould, who lived in the same area as me, came running up my stairs with a newspaper in his hand the next morning and said, 'Johan, we're in the newspaper and it's not good.'
"I was a bit tired after last night and wondered what was going on. Then Gould showed me the front page with the headline, 'Party, Pints and P**s'. Of course, the newspaper was adorned with our three faces."
And Mjallby was immediately summoned for a meeting with an unamused Martin O'Neill.
He added: "I was feeling rather downbeat and lacking in confidence when I entered Martin O'Neill's office. It was not a particularly large room, rather gloomy, with a substantial desk behind which the boss sat with a very serious expression.
"O'Neill looked at me sternly and said, 'Okay, what's your explanation for this?'
"I explained and thought, in an unbalanced state, that my 'clever' move to pee in a glass should make me less guilty than my teammate who peed in a flower pot.
"But Martin O'Neill didn't think so. He said, 'Johan, Johan, Johan, that's not one bit better. I expect so much more from you than the others. I even expect you to take care of your teammates when you're partying.'
"It was smart of O'Neill to take me aside for a private chat to make his disappointment with my behaviour extra clear. It hit home. I was ashamed.
"His words were a turning point for me - I took better care of myself as a professional footballer.
"But I got fined two weeks' wages - half a million Swedish kronor [£40,000].
"It was by far the most expensive trip to the bathroom in my life!"