Hello, I'm not only new here but I'm a newbie as well. I was watching You Tube a minute ago and the instructor kept referencing "the wall." He kept telling his student that "you need to press up against the wall". The student and teacher were out in the open range, nothing was around them, this "wall" he was talking about had something to do with being inside the trigger guard and where the student should place his finger first, up against the wall then squeeze. What is meant by "wall" Anyone?