From The LA Times. Jonathan Stark, 20, of Pittsburgh attempts a wheelchair trick. Walter Molo wouldn't go."Go, Molo, go!" his friends yelled.The once-avid motorcycle rider is not one to shy from adventure. But to dive 4 feet down a steep concrete embankment — in a wheelchair, while paralyzed from the waist down?"Yeah," Molo said, gripping his wheels a few feet from the edge. "I'm gonna have to