LOL My husband would have wet his pants. We put a cow bell at the bottom of the screen door that my cats would ring if they wanted to come in. I was afraid come winter I wouldn't hear them. Not to worry, they just grabbed the screendoor with their claws and banged it into the frame! LOL
When they were little we lived in a trailer with a scrap together screendoor. Butterscotch would run and jump on the door and cause it to swing open, Bashful would run in, Butter would then jump down inside and head to the food bowl. Resourceful little buggers