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.
Alwyn Cosgrove kicked cancer's ass. Twice. Of course, those of us who know him expected nothing else. Find out what makes this remarkable guy tick, or more importantly, find out what ticks him off.