When a cat wants to get through a door, some cats patiently wait until their human servants notice them and rush to fulfill their duties as butler by opening the door as quickly as possible, all the while apologizing profusely for making the cat wait.

Other cat owners simply buy a cat door sot he cat can go in and out whenever he or she pleases, which usually means any time that’s most inconvenient for the cat owner.

Yet if you watch the above YouTube video, you can see a cat that has learned to knock by kicking the door repeatedly with its hind foot. This machine gun-like kick certainly gets anyone’s attention, which results in the subservient human eventually opening the door.

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