Okay so I'm trying to vault something sideways (where the thing I am trying to vault is on my side). When I jump up and push myself over with one arm, my opposite knee pops/cracks and it hurts. I have no clue what's going on or what I'm doing wrong. Usually I'm not running when I do this kind of vault. When I do run and sideways vault, it usually doesn't pop/crack.
Visual Learners: