As silly as this video is, it still serves as a good reference for the motion of the human form jumping. Although it doesn’t have an reference for a solid landing, the take off has a lot of variation.
I found this great Youtube Channel called “EndlessReference” its packed full of reference videos for all types of movement. It’s handy that they show the footage from a side view and front view so it would be possible to use it on an image plane in Maya.
1:10 for slow mo ballerina leap.
1:20 slow mo facial movement
I’ve included images as reference also, as the really capture the essence of the moment and express a lot of emotion, particularly on the little boys face. It is also grate reference for how the body contorts on a still frame.