A Rangers fan has been banned from every football ground in the UK after injuring a Dons supporter during a cup-tie earlier this year.
Craig Kincaid, 21, hurled a seat over the segregation fence at Pittodrie at the end of the Scottish Cup match on March 3, hitting 20-year-old Bailey Smith on the head.
Kincaid had been due to stand trial at Aberdeen Sheriff Court this week but admitted culpable and reckless behaviour.
He was told his actions had been “outrageous and dangerous”.
Fiscal depute Lynne MacVicar told the court: “As the fixture came to a conclusion there was a significant increase in the level of excitement among both Aberdeen and Rangers fans.
“This led to both sets of fans moving towards the segregation fence, resulting in damage to a number of seats.
“The complainer exited his seat, coming closer to the segregation fence in preparation for exiting the stadium and while queuing was struck to the head with a piece of plastic seating which had been thrown over the segregation from the Rangers away support.”
The court was told Mr Smith “immediately suffered dizziness and blurred vision”.
He went to Aberdeen Royal Infirmary for treatment and was found to be suffering from mild concussion.”
Kincaid’s agent, solicitor Debbie Ginniver, said her client was an “avid football fan” who coached youngsters and “reacted badly” after being hit by a missile.
She said: “Football is a big part of his life and he accepts his behaviour was totally out of order.”
Sheriff Ian Anderson told Kincaid, of Glen Fruin Road, Greenock: “As a keen and enthusiastic football supporter you must know how outrageous and dangerous what you did was.
“You know how worrying and troublesome it is when people behave in the way you did at football games.
“It provokes other people and the situation gets worse. I’m told you got hit, but that’s not an excuse for what you did.”
Kincaid was banned from attending football matches in the UK for two-and-a-half-years and fined £350.
Outside court, Mr Smith said: “I’m happy with the sentence. You can’t go around football throwing seats and get away with it.
“I was pretty shocked at first and I stumbled over a few seats.”
An Aberdeen FC spokesman said: “This is a good example of the club and authorities working together and, with the increased technology now in place at Pittodrie, the outcome demonstrates that this type of behaviour simply will not be tolerated.”
A Rangers FC spokesman said: “Rangers has embarked on a new code of conduct and will consider further options under that.”
The game finished 1-1, but Aberdeen went on to win the replay in Glasgow 2-0.