Well European nights in mid-July are only ever memorable for the wrong reasons and no Celtic fan will be forgetting this one in a hurry. Humbled by a side of part-timers from Gibraltar, a country with a population half the size of Celtic Park.
The Brendan Rodgers era begins in ignominious fashion with arguably the worst result in the club's history. He will want to limit the damage with a convincing victory in the second leg at Parkhead next Wednesday to see Celtic through to the next round.
The likes of Gordon Strachan and Neil Lennon have suffered bad European defeats early in their spells in charge to go on and become successful Celtic managers, and the former Liverpool boss will be confident he can follow suit. However, this result will always be a black mark on his record and Celtic's reputation.
Fair play to the heroes of Lincoln Red Imps though. They earned the biggest result of their lives and deserve to enjoy the celebrations.
Thanks for your company and contributions this evening. Keep across the BBC Sport Scotland website for all the reaction to tonight's shock result.