This is apparently taken from a Dutch documentary on the subject of those trendy breakless fixie skidder bieks and there's a whole story behind this but I'll let somebody else who knows more tell you more...?
EDIT.
Here's the link mentioned in the comments to the post:
http://www.mediamatic.net/page/155201/en
Also, remember to check out the Pristine Fixed Gear Shop in Amsterdam if you're visiting:
http://www.pristinefixedgear.com/
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