Cats are literally smart as fuck. Like people talk all the time about all the great things you can train dogs to do and sure that’s nice but don’t sleep on cats. Our old cat used to open my sister’s bedroom door by slipping her paw underneath and elastic strip that stretched across from the top to the bottom of the door (to hold shoes), and pulling it. She also quickly realized that when she walked across the piano that was by the front door we would come to investigate the noise so when she wanted to leave she started intentionally stomping on the piano keys to get us to come let her out.