The world's most glorious athlete, Usain Bolt, finished his last race in the most inglorious fashion, walking across the finish line.
That was just six hundredths of a second slower than the USA's new world lead time, as Great Britain progressed as second fastest overall, with Bolt's Jamaica in third. Expect Jamaica and United States of America to fight for golds should they get the baton round, while Germany have strong teams and Britain have high hopes of snatching a life-affirming fourth.
Allied with a charismatic personality, it has guaranteed Bolt recognition as one of the world's most successful sportsmen.
As Talbot visibly screamed his team-mate on Mitchell-Blake held off the formidable Christian Coleman, unaware of Bolt's plight, and secured a historic gold for Britain.
He hobbled and went down in agony as Britain kept on going to hold off the US and take gold.
Beijing worlds silver medalists China finished fourth with second-leg runner Xie Zhenye just coming back from injury.
Then came Bolt, and the Jamaicans needed him. "All of us were doing our best to make that happen, but unfortunately, injuries are a part of this sport and it's devastating what happened, but we have to find a way to deal with it".
He had been bidding for a 12th world championship gold to bring down the curtain on his glittering career, but instead limped out of the London Stadium arena. "After DQs in recent years we knew we had to get the baton round and to finish the night smoothly is a fantastic achievement and we'll enjoy our moment on the podium", said Gatlin.
US-based Mitchell-Blake, a relative newcomer to the relay squad, said: "I dreamed of this as a child". The men won a stunning gold which nearly overshadowed Bolt's demise and the women, who finished third in Rio and ran onto the track to celebrate with their counterparts, grabbed a deserved silver.
The changeover to Talbot was excellent and the bend specialist didn't disappoint as America and Jamaica realised they were already playing catch-up.
Ujah said: "I am proud of these guys and those behind the scenes".
Lasitskene, who missed last year's Rio Olympics because of Russia's suspension, failed at 1.99 twice but regained form thereafter.