This particular question for me has changed over the years. When I was competing, I was primarily interested in those techniques that were hidden within the movement of another. So, in essence, it deceptively distracts from the true purpose. As an example, in competition, if you start to do a front kick, and the person goes to block it, you change that kick, keeping its momentum to a roundhouse kick and catching that person unaware, and in doing so, score the point.
Similarly, there are some techniques in kata (formalized routine) that are hidden in the movement and can be deceptive in their approach and meaning. The move may contain a grab, which leads to a throw/takedown and ultimately results in the breaking of the person's bones. All of this, which may be concealed and overlooked by the simplicity and fluidity of the action.
However, now I am more focused on teaching. And teaching has taught me that it is important to be able to explain how the body moves during, in the middle, and at the end of a technique that can provide mastery in doing it correctly. It's through this performance/perfection of clarity that the tactic does away with wasted movement and failed attempts, and executes a well-timed technique(s) for maximum effectiveness.
