Diehard Celtic fan Steve Conroy walked out onto the Parkhead pitch and was intoxicated by the astonishing atmosphere – the only issue was he was the referee!
It was the vital new year game in 2010 with Tony Mowbray chasing down Walter Smith, whose side held a seven-point lead.
It was Conroy’s first and only Glasgow derby – and he left his fellow Celtic supporters sick by disallowing a goal and failing to send off Kyle Lafferty.
