We have created several WTK Beginner Level Reaction Drills in order to help our students develop their sensitivity to the different forces they will encounter during a fight.  The Reaction Drills begin with the Lap Sau cycle.  In this particular video, the Attacker’s punch is not moving towards the center.  Instead, the punch is moving towards the Defender’s shoulder.  The Defender feels this force and the Attacker’s punch creates the Defender’s Tan Sau movement.  In addition, the Defender’s Wu Sau thrusts forward since the way is free.  Finally, the Defender follows through with a Pak Da.