what the hell is the advantage of that?
I've changed my mind - we don't need helmet laws. Let's just let Darwin take care of these idiots.
wait so he pedals backwards to go forwards? can't see the chain, looks like the little wheel is the driving gear?
I could be wrong but I think I can see a chain coming from the top bike's chain ring connected to the bottom bike's one.
Perhaps it is some sort of braking system?