In this video sequence, the flow of the shooters movement is crucial.
It enables him to maintain the force of the rotation all the way to the actual shot.

The Shooter wants the defender to believe that he will launch an under arm shot.

Thanks to a major shooting feint, the defender comes down low on his left foot, this is when the shooter turns and launches the Twist feint.

If the shooter has calculated his timing right, he has two more steps left to twist around and launch his shot.

In order to pull off the feint, you have to execute it clearly and thereby leaving the defender rooted on the spot in order to increase your shooting chances.