What is a hipster? Look at this fucking hipster...

Is that bike 'driven' via the wheels? I can't seem to spot a chain connection to the bottom drivetrain.

Then again, I can't spot a chain at the top drivetrain, either. May just be the low-res photo.

At first i presumed that was how it worked which explained the additional rearwheels but then i noticed the bottom bike has a drivetrain, infact, looks like one either side so now i dunno.