Squadron leader Jez Allinson has set himself the task of running 1,000 miles in a film-accurate replica Star Wars stormtrooper outfit.
The helicopter navigator can usually be seen clocking up the miles at RAF Benson, but his training runs have also made him a celebrity in the nearby town of Wallingford.
He has been running as a stormtrooper since taking part in the London Marathon in 2016 when he raised over £5000
The suit is so uncomfortable and stiff the challenge is expected to take the whole year, but will have raised more than £50,000 for charity.
Jez is currently on deployment with his squadron in Afghanistan where the altitude makes the challenge even harder.