 
   register: (controller) ->
     if typeof(Leap) is 'undefined'
-      throw new Error "Leap could not be found. Did you include leap.js ?"
-
+      console.log 'Your controller is listening for Leap Motion actions, but Leap could not be found.'
+      console.log '  Did you include leap.js?'
+      return
+    
     if controller.on_leap_frame
       @startLooping()
       @_captures.push 'captureFrame'

# this funky syntax is to prevent `Leap` from resolving to
# `Jax.Input.Leap` within the class definition.
Jax.Input.Leap = class _Leap extends Jax.Input

      @startLooping()
      @_captures.push 'captureFrameScale'
      @on 'frameScale', (data) -> controller.leap_frame_scaled data
    if func = controller.leap_frame_translated || controller.leap_frame_moved
      @startLooping()
      @_captures.push 'captureFrameTranslate'
      @on 'frameTranslate', (data) -> func.call controller, data
    if controller.leap_hand_added
      @startLooping()
      @_captures.push 'captureHandAdd'
