A 28-year-old Guinness World Record holder died while practicing for a world record motorcycle ramp jump in US. Alex Harvill already owned a Guinness World Record of his own, with a 297-foot dirt-to-dirt motorcycle ramp jump in 2013. Harvill was hoping to break the distance record for longest motorcycle ramp jump, set at 351 feet by Robbie Maddison in 2008.