I had a cat (weighed about 16 lbs, mostly in his stomach) that simply attached himself to the screen door with a loud thud to let me know he wanted in. Somehow, he never tore the screen door. If he was sitting on top of the opened garage door when I drove into the garage, he would jump off the garage door onto the top of the windshield and proceed to slide down the windshield. By the time he got to the bottom of the windshield, I had stopped the car. Perfect timing.