Lower the bar down to the knees, as if you were doing a Romanian deadlift.
Explode into a vertical jump while holding the bar. Do not pull the bar. The arms stay straight.
Don't lower the bar too slowly. Just keep it under control. Be sure to finish the hip extension; make yourself "tall." Don't be surprised if you jump backward a bit when you get it right.
Scot Abel is a bodybuilding anarchist. He doesn't believe in tempo training, pre-determined rest intervals, back-off weeks, or the fact we have elves in the basement that make Metabolic Drive. What he does believe in is pretty cool, though.