From PART ONE - The Promise of Chi Yi
The following challenges to the imagination are the first of several "imagery drills," which make use of mental pictures to help you experience specific sensations or feelings in the body. These mental pictures are metaphorical descriptions of particular movements that may be otherwise impossible to describe. They communicate a muscular process indirectly, through the use of images of movement. Such images are useful in elucidating invisible, internal movements and subtle adjustments of the body. This brief introduction to the awareness of inner energy merely suggests the energy source you will learn to tap in the exercises and applications that follow.
These imagery drills may be difficult for those who are unaccustomed to manipulating their breathing apparatus. Many athletes, singers, and musicians who play wind instruments, for example, are conscientious breathers, and will be able to handle the drills easily. Others will need to wait until they have practiced a good number of the exercises in Part Two before being able to complete the drills correctly and with little strain...
The first of these drills, the Eyedropper Imagery Drill, introduces you to abdominal breathing, an important step in learning to breathe to the core at will.
Picture yourself as an upside down eyedropper. Squeeze the bulb and air is squeezed out. Release the bulb, letting it expand, and air is drawn into the body. The complete exercise is animated in the video/DVD and explained/illustrated in the book.