Fakie wheelie anyone?

Yep, the chain was mentioned above already and it was the first thing we can see (that the bottom is slack). Perhaps that's why my mind suggested the direction of the wheel? :-)

Yep, the chain is a massive clue, also the way the front wheel leaves the ground is a give-away, it is not dampened in anyway whatsoever - it's acceleration is instant.

Now enough of the analysis, let's find this cyclist and kill him.