It cannot be overstated how truly baffling a game of football this was.
With 30 minutes gone, Celtic were four goals clear and cruising to the promised land of Champions League football and mega money.
After 60 minutes, they were running scared.
As soon as LASK got within one, Celtic were stunned and looking physically spent.
For a side that pride themselves on their ability to find a way to victory regardless of circumstance, of the knack of grinding out results in the biggest of games, they had nothing left to give.
Call it a crisis of character, call it a terrible time to stumble, there were issues everywhere you looked.
Squad depth, conditioning, attitude, and composure - they were lacking in all areas despite taking such a commanding lead in the tie.
When they needed a foot on the ball and a calming influence to turn the game down a notch or two, no-one took responsibility.