Surfer Ninjas

The car engine was running when I turned my head and saw these two skim boarders I'd been photographing earlier doing back flips off a swing set. Of course, everyone's seen people do back flips here and there and its always impressive, but this scared me. One of the guys then got up on the tower (background) and did a back flip off that. Didn't make as good a picture, but my spine throbbed just watching it happen.