There wasn't much violence in the typically turbulent Old Firm derby on Sunday afternoon.
Celtic crashed out of the Scottish Cup in a penalty shoot-out against their fiercest rivals Rangers.
Five yellow cards were handed out over the 120 minutes, with no flashes of red, and many were surprised at the relatively tame grudge match.
But there was nothing tame about an exchange that took place in Belfast airport on Sunday night between a small group of supporters.
Travelling fans of both clubs loudly argued with one another near the airport's entrance and things took a violent turn when an elbow connected with a Celtic fan before security intervened.
Video via Belfast Telegraph
