Whether it is his naturally relaxed style of running, but to me it looked as though Bolt was not going flat out as he took the World crown with a world record time of 9.58 seconds at the weekend.

His fans are saying he can go below 9.4. I am not too sure on that one but based on the weekend's performance he might be able to shave a further tenth of that record.

He's an absolutely incredible runner, I wouldn't be surprised if he did eventually go under 9.4 seconds though maybe under 9.5 would be a more realistic target for the time being.