Kinect’s skeletal tracking can detect punches and kicks. The system was originally intended to alert medical staff to patients who are acting out violently. It could be put to use in security cams just about anywhere that a little rough-and-tumble action might break out. So far, the system is good at detecting kicks, but is getting better at spotting more “subtle” moves like face-punches and body-slams. Particularly scathing verbal attacks are still undetectable.”]
Source: https://gizmodo.com/kinect-powered-security-cams-can-tell-if-youre-fightin-1462276556