When cats want something, they make sure they let their desires known. That usually involves lots of howling, meowing, and unearthly wailing as if the cat were being tortured to death in an effort to make you feel guilty and give it what it wants.
When one cat wanted to go outside, it made no effort to hide its desires by clawing the door and howling at the top of its lungs. Of course, the cat’s owner refused to let the cat out for its own safety. That left the cat a little perturbed and upset, but at least it’s safely inside.