Ryan Dunn, one of the daredevils who helped make Jackass famous, was killed this morning after his Porsche flew over a guardrail in West Goshen, Pa., according to the West Goshen Police Department. He was 34. Dunn’s 2007 Porsche 911 GT3 was in flames in a wooded area near Rt. 322 and the Pottstown Pike when police arrived arrived around 3:00 a.m. Excessive speed may have a contributing factor in the accident, the police believe.