Back when he was younger and more energetic, every time I went grocery shopping my Sir would identify one plastic bag that was weak and separated from the herd. Only one bag every time, but he'd pounce and tear and chase it back and forth across the room until it was thoroughly shredded, then retire to his perch.
My cat had a fetish for rubber/elastic bands. She would hook one around her big toot and the other end on her claw. Then she would suddenly release the band and get hit hard in her poor face much to her shock and dismay I would almost wet myself watching the scene unfold