that is a very unfortunate and tough situation to read about. everyones input here is very good. in addition to the comments made: good kite instruction has come a long way from aggressively holding a "student" by the back of the harness. that is almost a telltale of a poor lesson, at this point. that may sound crazy, but it is generally true. if you are an instructor reading this and dont get what im saying, feel free to pm me and step up your game. if your at the beach, the guy holding the harness is not in a good position to help the person flying the kite, nor prevent an accident like this one. it has its time and place, but is really not the "default" best place to be in order to help your client or maintain control of the situation. if you see that classic instructor student setup, it may be a good reason to take a closer look at the situation. good kite instruction is very different than it used to be.
PROKITE SOUTH PADRE