CROSS PUNCH

This is one of the other punches that uses the first two knuckles. This
punch is used to the hard bony areas and so it is a snapping punch.
This also starts out from a block with the other hand. Photo No. 141.
Notice the position of the punching hand before it punches. It is
placed in a vertical position. When the body steps in and turns at the
waist the palm is thrown out. Just before impact the waist is jerked
back the other way, which causes the fist to have the whip effect.
You then flick the wrist over and form a light fist so that the wrist
flicks into the object.