No no no, my Dear Hoggy, I don't have a picture, although one could be sourced;
The award must go to the mobile treadmill, as shown on the David Walliams bad ads show. It's a treadmill, as anyone would use in a gym, but on wheels, powered by the treadmill, and steerable...
So you run the treadmill, at the same speed as you would on a treadmill, but on a mobile device, that powers you down the street at the same speed as running, but you are running on a treadmill. So therefore, running down the street, on foot, is better than using a mobile treadmill, to run a treadmill, or a stationary treadmill? Argh Confused!
OK You saw those railroad things where levers are pushed up and down to provide power to a cart? no.? Watch the programme!