Farah, 34, will now turn his attention to the marathon after failing in his bid to double up at the Olympics or World Championship for the fifth time, including double gold in London 2012 and the Rio Games a year ago.
The Jamaican superstar uses a barrel roll to break his fall. Usain was getting cold and he said "I don't like" this. "Usain Bolt's name will always live on".
The look of anguish on his face says it all.
'We kept warming up and waiting, then warming up and waiting. "I think if that hadn't happened, may be we would have run quicker, as would other teams", Gatlin said.
"You have to think about the athletes because we were in the mixed zone too long, over 40 minutes".
"It's heart-wrenching, I gave it my all and I really wanted Usain to leave golden - even if it was just a medal", added 23-year-old Omar McLeod.
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At the start of last night's The Late Show with Stephen Colbert , a video package would pose this same question. One exchange was particularly awkward between Scaramucci and Colbert.
Bolt received the baton with Jamaica in third but, halfway down the straight, the all-time great started clutching his left thigh, eventually falling to the ground.
But while the image of the eight-time Olympian collapsed on the track nursing his calf, long after the race had finished, certainly made for an unwelcome sight, it was a night to remember for Great Britain's golden quartet.
He lay there motionless for some time as medical officials rushed to his aid, bringing a wheelchair onto the track. Helped along by his teammates, Bolt did cross the finish line barefoot.
The Jamaican great pulled up with an injury in the anchor leg of the 4x100m final at IAAF World Championships on Saturday, leaving his fans, who were witnessing the historic moment, devastated.
The official diagnosis afterwards was a cramp in his hamstring.
It was bitterly disappointing for Bolt with the team doctor saying the injury was simply a cramp in his muscle, and the pain on Bolt's face was mostly from losing the race. "The last three weeks have been hard for him, you know. I've proven myself year in, year out, throughout my whole career", Bolt said about his legacy in the sport.