BERLIN (AP):

When Usain Bolt crossed the finish line and saw his record-setting time on the clock, he spread his arms as if he were soaring like a bird.

About all this guy can't do is fly. And by saving his celebration until after the finish line this time, he showed how fast a man really can go on two feet.

The Jamaican shattered the world record again Sunday, running 100 metres in 9.58 seconds at the World Championships to turn his much-anticipated race against Tyson Gay into a one-man show.

That was 0.11 seconds faster than the mark he set last year at the Beijing Olympics - the biggest improvement in the 100-metre record since electronic timing began in 1968.

Running against himself

Bolt's only real competition these days is the clock.

And when he's really trying, not hotdogging it over the line the way he did in China, even time itself doesn't stand a chance.

"I don't run for world records," said Bolt, who crossed the line with a slight breeze at his back.

Yet those records always seem to find him.

He thinks he can go even lower.

"I know I said 9.4," Bolt said, grinning. "You never know. I'll just keep on working."

Last year in Beijing, Bolt shut his race down early, waving his arms and celebrating about 10 metres before he got to the line. Some, like President Jacques Rogge of the International Olympic Committee, viewed it as a sign of bad sportsmanship. Most saw it as a welcome sign of relief for a sport that needed some good news after years of doping and scandal.

Even this week, the Jamaican track team was making headlines for the wrong reasons - a complicated doping case. Then a group of athletes who were uninvited to the Worlds by the country's track officials because they didn't participate in the team training camp got reinvited at the request of international officials.

Bolt made everyone forget about that and showed, once again, what a great sport track can be when the focus is on the track, not doping control and the meeting rooms.

Bolt ran his latest unforgettable race at the Olympic Stadium in Berlin, the history-filled home of the 1936 Olympics where Jesse Owens became the world's biggest track star. Bolt lives in Owens' stratosphere now, having set the 100 world record three times and also owning the 200-metre record thanks to the 19.30 he ran in Beijing to break Michael Johnson's 12-year-old mark.

Now he has added the World Championship, last won by Gay in 2007, to his Olympic title.

Not just a showman, he's the show

A Stanford professor estimated he could've gone 9.55 if he'd run full out through the line in Beijing. Bolt almost made that guy look like a genius.

It's easy to see why Bolt is such a crowd favourite. He's a colourful character who loves to entertain. The track is his stage and he didn't disappoint Sunday.

Before settling in the blocks, Bolt gave spectators a quick wave and did his trademark bow-and-arrow pose.

That drew big applause.

Then the real show started.

Unlike the Olympics, when he skidded from the blocks, Bolt burst out this time in his yam-coloured Pumas, opening a sizeable lead on the field after 20 metres.

From there, it could have been a stroll in the park. But there was no letting up this time. Before crossing the line, he glanced to his right to check on eventual second-placer Tyson Gay once - not in the picture - and then back at the clock. His face lit up as he spotted the digits '9.58' appear on the screen next to the track.

The party was on. He grabbed a flag and did a victory lap with countryman Asafa Powell, who finished with the bronze (9.84).

They even stopped midway down the track and did a little dance number. Too bad the song wasn't from rapper Akon, who wrote about the sprinter in a song, the lyric going, "Quicker than Usain Bolt, the fastest thing runnin'."

Next came pictures - lots of flashes popping - and hugs as Bolt greeted everyone who called his name - and they were numerous. The entire victory lap took about 20 minutes.

Or about 19:50.42 longer than it took to run his 100.