Video explanation here; The stuff about punch biomechanics starts at 4:20. Cliffs There is a video of action Film Star Michael Jai White explaining some boxing fundamentals to the late MMA fighter Kimbo Slice. White says "A lot of top boxers are taught to throw a flawed punch". This was seen by MMA fighter Mike Perry who effectively said that as White is an actor he is no position to be teaching a professional fighter. A beef between the two escalated. Meanwhile scientists out of the university of Tehran in Iran carried out a biomechanical analysis of a boxers punch. They noted that professional boxers avoid the principle that the shortest distance between two points is a straight line. They noted that by throwing with a trajectory that on paper would be inefficient it allowed for a pre stretch followed by a stretch shortening cycle which created a more explosive and powerful punch.