I think I know what you mean, but maybe you could provide an example of a map which it's done in? I think an example would be to get onto the window'd tower in the dry bases of jump...
There's a spot near the top of the ladder that I just stop. Then I push jump again and it gives you a little extra height, allowing you to get onto an object that you normally wouldn't be able to get on. I don't know the specifics, it's just a matter of getting a feel for it.