I've created an animation player that uses a secondary animation which resides on top level layer and plays using AnimationBlendMode.Additive. It's blending fine, but the problem that I'm having is that it won't stop playing. Regardless of if I put the wrapMode as Once or Clampforever, it still forces the lower level animation to continue to loop.

private var leanLeft : AnimationState;

function Start(){
        leanLeft = animTarget.animation["A1LFoot"];
        leanLeft.layer = 10;
        leanLeft.blendMode = AnimationBlendMode.Additive;
        leanLeft.wrapMode = WrapMode.ClampForever;
        leanLeft.weight = 1.0;
        leanLeft.enabled = false; // This makes sure the additive animation is turned off normally
    }

    function Update()
    {

             var hit : RaycastHit;
                //ray shooting out of the camera from where the mouse is
                var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);

                if (Physics.Raycast(ray, hit)){
                    //print out the name if the raycast hits something
                    Debug.Log(hit.collider.name);

                    if (hit.collider.name == "HitObject"){
                        PlayAdditive();
                    }
        }

        function PlayAdditive(){
            Debug.Log("Playing Animation Additive");
            leanLeft.weight = 1.0;
            leanLeft.enabled = true;
        }