In an ongoing series for the BBC News website, celebrities and news-makers get grilled in exactly five minutes by Matthew Stadlen.
This week, Olympic gold medal winner Sir Chris Hoy talks big thighs, fame and what comes next when you've struck gold.
Watch live coverage of the World Track Cycling Championships on BBC TWO, Red Button and the BBC Sport Website - Wed 25 - Sun 29 March.
One-Minute World News 
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