A racoon is the reason my cats live behind a flap/door controlled by an rfid reader. Prior to its deployment the racoon had learned to squeeze through the door then figured out how to open the latch on the food bin (quite difficult for a human to open). If I didn't have video of it opening the bin I'd have doubted it were possible. As mentioned in the article it looked as if it had rehearsed the unlatching ahead of time.