David Rogers/Getty Images
Fergie Fury: Ferguson received a jail sentence for his behaviour.
Duncan Ferguson became the first British footballer to be sentenced to a spell in prison after he was found guilty of assault for his disgraceful headbutt on Raith Rovers' John McStay.
The Scot didn't enjoy the best of times at Rangers, only managing to hit the back of the net on five occasions before moving on to Everton, where he would go on to become a legend.
However, "Big Dunc's" antics in the 4-0 victory over Raith in 1994 will ensure that he is also never forgotten at Ibrox Stadium.
The unfortunate McStay is probably still having sleepless nights too.
The off-the-ball headbutt wasn't spotted by the referee at the time, but Ferguson soon landed in hot water after he was convicted of assault for the incident a year later.