Animation keeps playing even with "loop" deactivated.

I made an animation with the animator in unity itself. I want it to “slap” when I click with the left mouse button . Problem is , the animation doesnt stop playing, even with loop deactivated . Screen : Imgur: The magic of the Internet

This is the code of the slappy script :

 function Start () {
    if(Input.GetMouseButton(0)) { animation.Play("slap"); }

Thanks .

as you see in the image, press the animation and untick the “loop time” option