The exercise involves a lateral lunge and a powerful cross over step. Its simplier to do than part I, but still amazingly effective.
I usually can tell right away if an athlete is going to get or break their personal record by looking at their hands. Are their knuckles white? Is the bar kept in line with the forearm?
Many people perform this effective leg exercise by jumping straight up and landing in one plane of movement. By adding a slight lateral movement the exercise is advanced.