function OnControllerColliderHit (hit : ControllerColliderHit) {   
    var controller : CharacterController = GetComponent(CharacterController);   
    var body : Rigidbody = hit.collider.attachedRigidbody;   
    if (hit.collider.attachedRigidbody != null && controller.isGrounded && controller.velocity.magnitude < 18 && controller.velocity.magnitude > 2) {   
     pushPower = Random.Range(2.5, 3.5);   
     if (body == null || body.isKinematic) {   
      return;   
     }   
     if (hit.moveDirection.y < -0.1) {   
      return;   
     }   
     var pushDir = Vector3 (hit.moveDirection.x, hit.moveDirection.y, hit.moveDirection.z);   
     body.velocity = pushDir * pushPower;   
    }   
   }