It's got a really big trunk...

Using actual tree trunks, Chinese artist Shi Jinsong has grafted on what appear to be functioning, workable scooter components, creating rideable - though likely slow and very unweildy - motorbikes. "I just want to know what a big tree - which is four or five meters long - with a speed of more than one hundred km per hour looks like," Jinsong says.

Two such bikes are pictured on the art blog designboom. One looks almost rideable, and many of the objects melded with the tree/chassis provide interesting plays on scale and implied function. And even though we doubt the second could ever manage 100 km per hour, it's strange enough to make one really wish it could.

Tree motobikes (weblink)