Aberdeen put an end to Celtic's unbeaten run
Dons manager Steve Paterson had confessed just minutes before kick-off that all he had been hoping for was a defeat that was not too painful for his injury-ravaged side that featured nine players under 21.
But when substitute Bryan Prunty, the former Celtic reserve, cancelled out Henrik Larsson's 15th-minute opener the stage was set for an upset no-one had been predicting.