Cool! I wish I'd had one of these when I was a kid. I was always fouling my chain (sounds dirty, eh?) in my jeans (even dirtier, huzzah!).
I should look into getting one of these for my da. He loves to ride the back country roads, but he looks ridiculous with all those rubber bands around his ankles.
Obviously your shoes were magically brought to you at a cost of zero energy by...um...elves. SPACE elves. From Mars.
And does the monitor come with a tally of the amount of energy used in its creation? I see it's made from plastic, or the case is at any rate. Was it made from RECYCLED plastic (which actually takes more energy to make than fabricating new plastic)? Enquiring minds want to know!