I was talking about long jumps. Jump 5 feet forward and you can keep climbing up for eternity.
First, you would need a lot of actions to do that. Even a 5 ft jump is a move action.
Second, the rules for falling still exist, so you can't ever allow yourself to end your movement or you'd probably qualify for falling.
So if you're going to do it, at least use a Raptoran or something where falling isn't a major setback.
Or you need a jump check so big that gravity can't keep up. Dare I say Chuck?