title: Sprite Kit - Adding two physics bodies to one SKNode
body: <p>Is it possible to add two (ore more) SKPhysicsBodys to one SKNode? Something similar to this:
  <a href="https://dl.dropboxusercontent.com/u/48105952/pic.png">Example from PhysicsEditor</a>
  Because the head of the character should collide with a ball, the top should be round. Furthermore the ball mustn't go through the player. Do you have an idea how to accomplish this?</p>