Usain Bolt: The Fastest Man Alive, BBC One, preview It's a very different Usain Bolt to the one seen in the rest of the film, joining in a football game - "make sure Alex Ferguson gets this tape" - and making playful remarks about his time in Rome, a city which he's heard has the most beautiful women in the world: "If I get lucky, I'll give you the thumbs up." "Even in 60 days of filming, you can't catch the real Usain," Leiblang tells me later, "but in that moment I had another piece of Usain that I didn't have in the six months before." In the course of the documentary, quite a few other pieces of the man emerge that might surprise viewers who have only seen the laid-back, confident character who turns up at the athletics track. We learn, for instance, that when American colleges began queuing up to sign him as a teenage track star, the youth from the small rural village of Sherwood Content didn't want to leave home. "I was really close to my mum," he says, "I'd never lived away from my parents for more than a week or weekend. For me to go and live somewhere else by myself would be hard, so I didn't want to go. He stayed in Jamaica, eventually coming under the wing of Glen Mills, who reluctantly allowed Leiblang to film him training the world-record holder alongside sprint rivals Blake and Daniel Bailey from Antigua. We see Bolt being ticked off by his coach, in Jamaican patois, apparently for false starting - "Why you pick the start? You, yes you pick. Not even fractionally, big!" - the problem that would recur in Daegu. How did Leiblang talk his way into that kind of access? "Sometimes it was hard," he admits. The people around Usain are tough, the agent is tough, the personal manager is tough and the coach is really tough. How soon after the false start in the world championships, I wonder, did he think, "that's good for my film"? For the first couple of minutes, he admits, he didn't know exactly how to feel. I wasn't filming the race, I was filming Usain's mother watching it in the stands, so I didn't understand instantly what had happened. But then for a few minutes I was completely devastated. I was sad for Usain, I wanted him to compete. It was my producers who realised before me that it was good for the film. The relationship between the two men inevitably becomes part of the documentary. They first met in Beijing; Leiblang had also been to Jamaica to shoot a report on the sprinter for French television after the Olympics. When Bolt packs for Europe, Leiblang asks if he is taking any books, to which the sprinter replies he's not much of a reader, he's more of a PlayStation type of guy. "The Bible?" asks the Frenchman. What you trying to do, make me look bad on TV, man? Bolt retorts, which is as close as he gets to tetchiness. Leiblang is clear, however, about the line between film-maker and subject. "I'm not his friend, he's not my friend," he says. Perhaps the best moment of the film is a beautiful sequence of Bolt explaining what happens through every phase of his 100 m, what he's doing, what he's thinking. A race that takes less than 10 seconds on the track takes up minutes of the film, with Bolt telling the camera. Last 10 metres, you're not going to catch me, no matter who you are, no matter what you're doing, no matter how focused you are, no matter how ready you think you are, you're not going to catch me, because that last 10 metres is going to take me three and a half strides to pass the finish line. In three weeks" time, barring injury, in what is likely to be the most hotly contested 100m final of all time, we'll find out if that's true. Usain Bolt: the Fastest Man Alive is on BBC One on Monday 16th July at 10.35pm