Ok, found this to be pretty funny. He was impersonating a cop...smart idea!
http://www.orlandosentinel.com/news/local/breakingnews/os-james-stewart-motocross-arrest-20110328,0,1565867.story
http://www.orlandosentinel.com/news/local/breakingnews/os-james-stewart-motocross-arrest-20110328,0,1565867.story