This Hidden Attack utilizes the principles of Attack By Drawing to create a mental as well as physical opening to attack through. There are MANY different effective & applicable timings and distances for  this type of attack,   A few of which are shown here, although it could be difficult to detect at first.  Look for the distances of hand & shoulder movement (both) in contrast to his reactions.  NOTE: this type of tactic works best against a defender, that likes to block , then attack. Rather than a charger, that likes to block (or Perry) AS he charges in.  A charger tends to attack INTO an attack which, if he is a good deflector of attacks, can make him a very dangerous adversary…  So much so that you would be wise to pick up this skill your self..