Martin WIERIG is one of the best German discus thrower with a PB of 68,33m . At the time (2013) NZL athlete Alexander PARKINSON was only a beginner (He has now a PB of 60,86m with the 2kg) . The document uses a training throw of WIERIG at the OG London 2012. Both are using the full blocking delivery and have about the same size (2,02m). It is interesting to compare the technique of an elite athlete with this of a beginner and you can easily pick the faults done by the later as the document contains slow motion and comparative still picture at key positions