"GTFO," you say. Hang on. The force couple is the foundation of many martial arts. You will recognize it in the Yin-Yang symbol- the circle with swirls of black and white. When you combine equal and opposite forces on parallel paths you get rotation. You will also see force couples in kata if you know what you are looking for. Here are some clues: simultaneous pulling and pushing actions; pivoting and turning (obviously); certain actions and poses to which no application can be attributed other than "chambering."
Speaking of scissors ("hasami" in Japanese) there is the infamous crab claw takedown (kani "basami") of Judo. This just to illustrate how pervasive the principle of the force couple is. Look for it in your kata and you will have a better karate.