Ahp Nak Bub is a Front Fall. One of the first falls taught in Kuk Sool Won™, Ahp Nak Bup involves falling face first from a position in the air in which the student's body is horozontal. The student lands on the balls of his feet, and on the plane between wrist and elbow. Hands are flat down, fingers spread apart. Head is turned to one side. Once this is mastered, the student can generally move on to a proper Ahp Nak Bub from a squatting position, and then from a standing position, and ultimately from elevated heights.