The funny thing is, the thing doesn't fly, but a shreiking demon suddenly swoops down and carries YOU straight to hell...

This smacks of something from a Photoshop contest. I'd bet this is on Somethingawful.com (too well done to be from Fark.) Either that or Maxim... I especially like the part about the flies being so happy. Bet they're just ecstatic when you get bored and pull them off, as their legs shatter and snap off.
Next time you're in a park, don't bother bringing rollerblades--just whack a couple of squirrels with a rock, and strap them to your shoes! A miracle is happening--the helpful squirrels carry you along with smiles on their faces! WHEEE!!!!