readily available for nonelite athletes or for a short runup preceding a run, jump, or dive. Push and throw data are not readily available either. It is also unlikely that the athletic ability of the victim will be available. Nevertheless, estimates can be obtained of the relevant abilities of a person of average athletic ability to determine whether a particular fall scenario is feasible or not. Figure 2 shows data that I obtained for a sample of four female police cadets performing various maximum effort tasks. The tasks included jumping feet first or diving head first from the edge of a swimming pool after a runup distance of 4.0 m, 4.5 m, and 5.0 m, and sprinting over a distance of 20 m on a level surface (without jumping at the end of the 20 m run). The athletic ability of the sample was then compared with that of a much larger sample of female cadets performing some of the same tasks as part of their compulsory fitness training. It was concluded that all four subjects were better than average in athletic ability but none were elite athletes. The data in Fig. 2 were obtained by filming each task and analyzing the film to determine the horizontal speed of the center of mass. A radar gun could also be used to measure running speeds. The data in Fig. 2 were used in a particular case study, as described in Sec. VII.