Begin this drill by teaching or review with the students a spinning back fist. Next line the students up in drill lines.
At the end of the lines have your instructors hold a piece of striking film vertically. On the striking film draw a red dot or circle about 3 to 4 inches in diameter.
As the students move through the lines and reach the instructor, they are to execute a spinning back fist to the striking film, focusing to hit only the red circle.
Explain to the students that by spinning with the back fist we increase the difficultly of hitting their target of the red circle, making them concentrate and focus harder.