John teaches the proper technic for shoulder transitions, which can be used in variable cover and concealment scenarios. Strong side versus support side shooting requires practice to plus up your skills. The Lovell Lean keeps you on your right eye, but requires practice for perfection.
John drills down on LOA - Limit of Advance - to preserve the cover safety line without flagging. The ESB or Eye, Shoulder, Base allows you to present a minimal target without canting your rifle. Effective cover allows you to present your own ambush.