Page 24 - Robert W. Smith - Pa kua_ Chinese boxing for fitness & self-defense-North Atlantic Books (2003)

13. BIG CHOPPING (Figs. 83-87)
From the basic 4-6 posture, swing forward with a big right step
as your left hand pulls back toward your left side and your entire
right arm travels in a big arc forward and counterclockwise. In the
function shown in Figs. 86-87, for variety, we use the left side.
Your opponent throws a right hand. You cross with your right,
grasp his wrist and pull him forward as your right leg goes forward
and your left arm chops at the base of his skull. This is a short
response necessitated by his attack when your left foot is forward.
Had your right foot been forward, you would have derived much
more power by taking your left foot forward with the left arm
chop. As it is, you can still get added impetus by advancing your
left foot and putting it down on or near his right foot.

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