How Far Can We Chuck a 16lbs Rock?

Summary
Mark teaches Ethan how to play shot put, a track and field event that involves pushing a heavy ball away from oneself as far as possible. However, instead of the usual spherical ball, the two use a 16lbs (7.25 kg) rock. As Mark hurls the last stone towards the camera, the video ends with a cut to black, implying that he struck Amy in the head.