Paris - Jamaican sprint legend Usain Bolt was back on the starting line on Thursday - but found it a challenge to stay on his feet in zero gravity conditions aboard an aeroplane.
The 32-year-old briefly broke off from his pursuit of a professional football career with Australia's Central Coast Mariners to travel to France for the event.
Dressed in a spacesuit, Bolt was aboard a zero gravity Airbus as part of an event sponsored by a champagne brand.
The plane performed a series of parabolas as Bolt and two other guests experienced a phase of weightlessness for 22 seconds, time for a race to be staged within the cabin.
The eight-time Olympic champion and 100m and 200m world record holder called time on his athletics career last year.