Within the free throw in basketball the explanatory model of all motoric movement actions provides the scientific proof that we beforehand perceive all free c.q. empty places between the ball and the basket. Solely if we are convinced that every consecutive position P between the ball and the basket will allow an uninterrupted passage of the ball then we will proceed with the factual throw action. Ergo the visual perception and/or the vision is actively recording if any random position P between the ball and the basket is empty and will allow the dimensions of the ball to pass. This seems to be the main objective within a free throw action but how can eye-tracking-gear ever record this? How can eye-tracking-gear ever establish that we deliberately look at places where obvious nothing is situated?