All over the city of Berlin hang posters of Usain Bolt, his smile radiating, his hands held high in triumph as he crosses the finish line.

Under the image is a simple phrase - 'Who faster?'

As if that's even open for discussion anymore.

Bolt was dazzling yet again, breaking another world record at the World Championships. This time, it was the 200 metres, which he finished in 19.19 seconds. He shattered his old world record by a whopping .11 seconds, the same margin he trimmed off the 100 earlier in the competition, when he finished in 9.58.

These days, no one can catch him. No one can even push him.

'Who faster?'

Second place, anyone?

How about who wants second?

"I didn't have that on my mind," Bolt said of the world record. "But I got it right so I'm just happy with myself."

Got it right, indeed.

In his race Thursday, the Jamaican went all out, holding nothing back. He grunted his way all the way through the race, trying to propel himself to the finish a little faster.

And just like at the Olympics in Beijing - when he started shattering records - his only competition was the clock. Even that didn't stand a chance. Bolt beat Alonso Edward of Panama by .62 seconds - a landslide in sprinting.

"It was flabbergasting," David Alerte of France said after finishing eighth. "I don't have the words to explain."

No one does. Nor does anyone have game to really challenge him right now.

Mullings fizzled

Jamaican teammate Steve Mullings tried to go out with Bolt, staying as close to him around the curve as anyone could. That only led to Mullings fizzling out near the finish.

"I ran myself out of a medal," said Mullings, who ambled home in fifth. "I did go with him, but couldn't hang on."

It's not easy following Bolt and his high-striding yam-coloured Pumas.

Shawn Crawford joked after the semi-finals that the only way to beat Bolt was to trip him.

Funny, but right now it's about as good a strategy as any. Bolt has completely changed the game.

"You don't want another competitor to get in your psyche, but he kind of does," said Crawford, who wound up fourth. "The world, including athletes, we start to expect something phenomenal."

Video game

He typically delivers.

Before the 200 race, Bolt stayed in his room playing video games. His opponents almost felt like they were in a video game when they were on the track against him. He's become that good, that dominant.

Bolt clowned around at the start, just like he always does. He even made a gesture to the cameras, illustrating that he was going to take off like a jet leaving the runway.

He flew all right, around the bend, past the competition, through the finish line and straight into the record books - again.

Keeps impressing

Bolt, who turned 23 on Friday, keeps finding ways to be even more impressive.

"The (9.58) is just crazy," Mullings said. "The (19.19) is just sick."

What's left for an encore?

"He's got an 18-second in him coming pretty soon," Mullings mused. "I just know it."

Once Bolt gets through toying with the records in the 100 and 200, he might just step back into the 400 realm, which he ran when he was younger. He's hinted at the possibility.

If that becomes the case, former sprint star Michael Johnson thinks his mark of 43.18 seconds could be in jeopardy.

That is, once Bolt make the transition to the demanding distance.

"It takes many years to learn how to train for the event and how to compete in the event," Johnson said. "If he's willing to put in the work, and hurt a little bit - which he's told me he doesn't want to hurt - but if he's willing to do that, I think it could be possible."

The signs hanging around Berlin say, 'Who faster?' But there's really no question about that.

- AP