Skatepark Round-Up: MadnessThis gang of concrete zealots relentlessly annihilates every vert wave in their sights. Holy Clay Kreiner. WTF. Keep up with Thrasher Magazine here: http://www.thrashermagazine.com http://www.facebook.com/thrashermagazine http://www.instagram.com/thrashermag http://www.twitter.com/thrashermag