For Ange Postecoglou, a petrol bomb on the streets of a wealthy Glasgow suburb ignited the fuse which led him to Tottenham Hotspur.
The 57-year-old is on the verge of taking over as the new Spurs boss after agreeing terms on a deal of up to three years - with confirmation expected on Wednesday - but not long ago he was being dismissed and mocked after moving to the SPL.
In May 2021, Scottish champions Celtic were laying the foundations for the appointment of Eddie Howe as their new manager.
A doomed obsession with winning a tenth consecutive league title had ended in rancour, recrimination and the departure of Neil Lennon.