Pat Bonner was left with his jaw on the floor after spotting what he thought was a big mistake from Adam Idah. Celtic beat Dundee 2-1 at Dens Park with James Forrest's double enough to seal the points.
But it got nervy after Dee defender Antonio Portales pulled one back with 15 minutes to go, setting up a grandstand finish. The Mexican centre-back got on the scoresheet after the Hoops failed to clear a corner and he directed it back towards goal from around the penalty spot.
On its way past Joe Hart, it deflected off Idah, who made his way out from the front-post area to try and block the shot. But former keeper Bonner couldn't understand why he was even in that area in the first place.
He told the BBC's Football Podcast: “I want to go back to the to the corner and the goal. I can’t believe that Adam Idah has gone into the near post area when he’s six foot whatever and he’s got to be picking up that six-yard box where the ball was landing in and he can deal with it.