RecentNews.uk
Alex Ferguson left Aberdeen for Manchester United on 6 November 1986.
BBC reporter Roddy Forsyth accidentally discovered the pair drinking champagne in an airport hotel.
Aberdeen fans and players were shocked and felt a deep sense of betrayal at the time.
Ferguson went on to win 38 trophies during his 26-year tenure at Old Trafford.
Tap below to vote and see what others think.