(can't hotlink video for some reason?)
BPO replaced the conventional pedal layout with bicycle pedals and a flywheel connected to a dynamo that sends electrical impulses to the ‘by wire’ throttle. The harder you pedal, the faster you accelerate. So you’re not actually foot powering the car directly, in the manner of the late, great Mr Flintstone, as much as you are generating electricity to drive the throttle.