Remember the mobile treadmill posted on Neatorama a while ago? Well, Flickr user frankh spotted a DIY version at MIT (where else?). Apparently, it's what you get when you cross a bicycle with a treadmill - via GadgetLab
It would be interesting to hear the actualy creators words, if he felt this was a method of transportation to help you get excersise, he is an idiot... if he did it just because he can and functions to some degree, it's pretty cool.
And how does it stay upright? looks to me like would topple over.