I'm just wondering how long it will be until someone tries to use one to jump a chasm or something. At which point it will stop being a bad idea and instantly become awesome. Would also benefit from a motorcycle engine for that extra boost when going uphill.

One concern, though... what happens if the runner... er... Treadmobiler falls off? That thing looks big enough to mess up an oncoming Porsche.

God bless the American entrepreneurial spirit.  I like Intrigued's idea, though.  Maybe some good can come of this!

He looks stupid. :O

Fun video. Thanks!

While my podiatrist gives me many reasons why not to run on a treadmill, if running outside is an option (the need to strengthen many more, different muscles in the legs, which running on uneven surfaces does), I do see one potential market: runners who are blind. If they are running tethered (?) to a partner, but wish to run on a smoother surface with a partner, but still run outside....  The running tandem segment on this made me think of that.   

Having just run 9 this morning and biking on a regular basis, all I have to say is "why."

It would be way more efficient to just run on the pavement.