Fig. 3. Graphs of the movements of the tibia and of the distortions of the semi-lunar process during a kick captured at 1000 images s^–1. (A) The distortions of the semi-lunar process and the movements of the tibia during the complete sequence are measured from every tenth image (10 ms intervals). (B) An expanded portion during the rapid tibial extension in which measurements from each image (1 ms intervals) are plotted. The semi-lunar process unfurls only when the tibia has already begun to extend. Circles, femoro-tibial angle; squares, proximal movement of the tibia; diamonds, movement of the semi-lunar process.