So, on a muggy night in Rio, Bolt took aim at Michael Phelps, shoving the swimmer and all his 23 medals to the background and made it official: The Bolt Games have begun.
Bolt beat American Justin Gatlin, who was greeted by the fans with raucous boos, by .08 seconds.
Andre de Grasse of Canada won the bronze.
Bolt has a chance for two more golds - in his favorite race, the 200 final Thursday, then in the 4x100 relay Saturday night.
He wasn't the only one to put on a show Sunday.
A few minutes before his race, world champion Wayde van Niekerk of South Africa eclipsed what many thought was the most-unbreakable record in the book - Michael Johnson's 17-year-old mark of 43.18 seconds in 400 meters.
Running out of Lane 8, where the lag puts him well in front of the rest of the field, van Niekerk never saw a soul - crossing in 43.03 and only glancing to his left when he approached the line to peer at the clock, which showed him what he had done.
"Usain Bolt will be retiring soon, but this could be the next star of the sport," Johnson said during his commentary on BBC.
The current star? That guy named Bolt.
The 6-foot-5 sprinter/celebrity overcame his typically slow unfurling from the blocks - he was second-to-last after the break - then churned his legs to gradually build up speed.
He caught Gatlin with about 40 meters left and the rest was a matter of how hard he wanted to run.
Gatlin pursued him gamely, the way he has for years. He finished with silver again and, while Bolt was celebrating with anyone he could find, Gatlin was parading the American flag around the track virtually alone.
The boos from the Brazilian crowd were the latest ugly chapter in Gatlin's saga. He's been caught for doping twice.
His last ban ended in 2010. But fans in the stadium bought into the "Good vs. Evil" story line that's been pitched by the media for all these years, and they let the American have it.
"That's the first time I've gone into a stadium and they've started to boo," Bolt said. "It surprised me."
A split-second after he crossed, Bolt raised the index finger, and then, the real party began.
Bolt unlaced his now-famous gold spikes and took selfies with the fans. He turned his yellow hat backward, kneeled down and gave the crowd what it really wanted - that famous, arching, "To the World" pose that he debuted eight years ago in Beijing.
Chants of "Bolt, Bolt, Bolt" rang out from the near-capacity stadium. Yes, the show lived up to its billing.
But this was not Bolt at his fastest. Four years ago, all three medalists broke 9.8. Nobody did this time, and neither Bolt's world record from 2009 (9.58) nor his Olympic record from London (9.63) were ever in jeopardy.It was not Bolt at his toughest.
Some might argue his gutsy effort at last year's world championships, when he overcame a season's worth of injuries to beat Gatlin by .01, might have been the grittiest race he has won.But it certainly took hard work.
Before the Olympics, Bolt hadn't run a 100 since June 30, when he pulled out of Jamaica's national championships with injuries to his left hamstring.The rehab started immediately, with trips to Germany to see his doctor, then a warm-up 200 in London to prove to his Olympic committee that he was fit for the Olympics.
Shortly after he arrived in Rio, he conceded that, yes, he wished he'd had more chances to run in real races, but that everything would be OK.
It was more than that. From the moments before he crouched into the blocks, putting his finger to his lips and asking for silence, until long after the race, when he worked the crowd, posed for photos, made the troubled world of track feel fun again.
He turns 30 the day of the closing ceremony and has insisted his Olympic days are over."Somebody said I can become immortal," Bolt said.
"Two more medals to go and I can sign off. Immortal."
