Impressive shadowboxing by legendary fighter Mike Tyson, in his younger days. The LONG method involves a shuffle of the feet that rocks the body back and forth. This is a style favored by fighters with long reach, who use more of jabs and straight shots. An example of this would be Muhammad Ali.
The SHORT method sees the fighter move his head and body to the left and right, constantly slipping punches and moving in for closer body shots. Joe Frazier and Mike Tyson are among the best examples of fighters who use this method.