An amazing fuck-ton of jumping references.
Note that there are several types of jumps. There’s the “proper” way to jump, where you keep a straight back and a bunch of other anatomical alignment junk that physical therapists tell you to do. There’s the “Wholly shit the building’s gonna blow up!” jump where the limbs are flailing, circling, doing whatever (you see this kind in action movies). There’s the “clearing an oncoming object in a very ninja-like way” kind of jump where the goal is to get as high as possible and tuck the legs in tight to the body. There’s the “I can touch the ceiling ‘cause I’m tall and you’re not” jump where you’re simply trying to reach something, so the legs are typically straight and the arms are stretching upward (also a slam-dunk jump). And there are athletic hurtle jumps, trampoline jumps, volleyball jumps, and the tackling your pursuee jumps. Many many jumps. What I’m leading in to is that you ought to know what the character is jumping for. When you identify the jump type, it’s a great idea to find video clips of it in many different situations (or for a specific situation, depending on how precise you want it for the scene), as this is an action you’re drawing, so the best way to grasp the concept of the movement is to see the movement.
O, and I found this after posting everything (if anybody’s interested):
[From various sources]