mary thompson, cnbc, empire, nevada. >>> you may have heard the term jumping a shark.ow about a shark jumping a surfer? a piece of vida to show you. a four-foot spinner shark leaping over a surfer waiting to catch a wave. a photographer who works for the orlando sentinel newspaper didn't realize what he'd caught on tape until another surfer standing nearby said, "dude, did you see that?" i think he said it like that, anyway. >>> when we come back, making a difference for veterans suffering from an all-too common wound of war. >>> among the many lessons learned after almost ten years d of war in afghanistan is that those who fight can never quite leave the war behind. tonight, we have the story of an innovative new approach to healing the scars of post-traumatic stress. one that for many returning war veterans is making a difference. here's lee cowan. >> reporter: there are few places further from war than wine country. but on a bike ride through napa's sun drenched vineyards we found a pitched battle under way. >> i saw just too much. i think it just broke me as a pers