World Stunt Champ Chris Pfeiffer is a maniac! Check out his BMW G450X chicken run with Christoph Langen in a BMW designed Olympic Bobsleigh at the Innsbruck Olympic Run! Sierra BMW Motorcycle www.sierrabmw.com www.sierrabmwonline.com www.instagram.com/sierrabmw/ twitter.com/SierraBMW www.facebook.com/sierrabmw info@sierrabmw.com