I've never seen a cat feign a limp, how cute! And very clever
My two are a lot less subtle about getting attention when they want it. Rather than feign a poorly paw they either meow continuously (and unnaturally loudly!) for at least 10 minutes, in such a way that it sounds like they're in trouble or hurt, proper yowling, and when I go through to see if they're ok, they just look at me like "what?!"
The other trick is jumping on our head from the top of the shelves in the middle of the night, when we're asleep. And after that, trying to eat my hair. (I should mention, at the root right by my forehead no less).