We had a cat named Mischief when I was growing up. My brother had a hefty goldfish bowl on a table in his room which held quite a weight of water.
Every day, Mischief would inspect the fish, spend a while trying to paw them out of the top of the bowl (the fish would sink to the bottom, Mischief could put his paw only so far down into the water), then give up.
One morning my brother and I were following Mischief around the house, but something changed. This wasn't a cat wandering aimlessly. We knew it was a cat on a mission, up to something, which is why we were watching him. He went into my brother's room, jumped up on the table, and we laughed. 'Stupid cat keeps trying to get the fish!'.
Mischief wedged himself between the wall and bowl, pushed with his front and back legs, and slid it off the table. It shattered on impact and we quickly tried to rescue the fish as he jumped down to grab them. He got one but we saved the rest.
He used the same move to pop the lid on his carrying case to the vet - he would lie on his back and use four legs to push the lid until the plastic clasps opened. We used to wrap tape around it to stop him from doing it, which terrified the vets when we showed up and handed him over. To get into my room, which had a dodgy handle and didn't latch quite right, he'd go down the hall, run towards it, jump and hit it with all four paws to batter it open.
Point is ... cats are pretty strong ... and smart enough to find ways of getting what they want!