Your cats' upper body strength?
By upper body I mean the fore legs and up.
Lately, I've noticed Zoltan doing the strangest thing. Instead of just jumping up on the window sill like a normal cat, he will stand on his hind legs and stretch up until he can grab the sill with his front paws. Then he presses himself up until he gets in the window sill without any jump to get started. The only help he gets from his back legs is a little scratching at the wall when he's near the sill to help him settle in. I've never seen a cat do that before and when I see my other cats miss their mark on the jump, normally they can't pull themselves up.
Have any of you seen your cats doing a "pull up" like that?
Even as a kitten, Zoltan seemed to have an unusual amount of upper body strength. I remember when he'd be hanging from the scratching post perch by one paw and he'd be able to grab it with his other paw and pull himself up. Whenever Knievel tried to do that, he always ended up letting go and falling.