Use $this

flight/Engine.php

@@ -447,7 +447,7 @@ class Engine {
      */
     public function _jsonp($data) {
         // Get the callback value (eg '?jsonp=my_function') and pad the output
-        $callback = \Flight::request()->query[ $this->get('flight.jsonp.callback') ];
+        $callback = $this->request()->query[ $this->get('flight.jsonp.callback') ];
         $this->response()
             ->status(200)
             ->header('Content-Type', 'application/javascript')