This looks like fun.

[EltonFrog]

www.halfbikes.com

They have a kick starter page too.

The fun of a Segway, (which are great by the way, if you have never had a go one try it) but with exercise too.

 

[TeeQue]

I think the link should be http://halfbikes.com/

 

[HorTs]

It does look fun, though I'm not sure it will have any practical applications.

 

[pauldavid]

Looks like a right laugh, I'll have one