Sorry to pick on you, but your posts made me sad.
As far as I know, though, there are no rules for a 'jumping attack' that the cat could perform. There might be powers that recreate that situation, but if there panther doesn't have said powers, it's out of luck.
The only thing I could think of is to ready an attack for when you're mid-height in a jump, but you can't take readied actions on your own turn or set up triggers that involve your own actions (IMO).
~
Meh, way to kill creativity in an RPG. =( "You can't jump and attack because you don't have a power that says you can"...yet across 3 editions of D&D and 50+ gaming groups I've been seeing people perform leaping attacks left and right, using various ad-hoc rules which are an integral part of the system. You don't frigging NEED rules for a jump attack because it's so easy. You use your move action to jump, and however high you get, you can swing at the top with a basic attack. Problem solved, without contrived conditions and ridiculous penalties. Or you can charge and jump during the charge...if you're taking a move action, you can jump. That's it. There's no reason to assign penalties to it, because you're not gaining any kind of advantage that isn't
already accounted for in the rules for skills and, specifically, Athletics.
I have five cats, and they leap around trying to catch bugs, so I know this technique is possible to attempt . . . but I also know it's not generally successful.
~ fissionessence
That's because a) they are playing and b) instead of "attacking in combat" they are, literally, trying to capture a highly mobile insect in one hand, or in their mouth. I'd l ike to think it's generally unsuccessful because they're trying to be stuntmen and grab bugs out of a midair backflip and not because your cats are just inaccurate. Felines are absolutely born for mid-air attacks.
Go watch big cats on youtube or something. I watched this one where a tiger flew out of some tall grass and jumped up like 20 feet onto the back of a MOVING ELEPHANT to grab a guy sitting up there. The ONLY REASON the guy didn't become a snack is because the elephant smelled tigers and bolted at the last possible second (and also his friends shouting and trying to drag him backward) thus moving the man out of harm's way. That guy was DEAD MEAT, he looked like a deer in the headlights.
So...if that was a spider on a ceiling and not some dude on an elephant, it'd be game over spider.