I/We learned many years ago behind a 16 ft Invader with 150hp outboard.We cheated at first wearing running shoes as well. We learned starting deepwater sitting on a kneeboard. It is was one of the coolest sensations once i was able to make a coplete loop/run without falling.
As for the falls ,OUCH. falling at 40mph Hurts big time. We eventually learned there is even a correct way to let go to minimize the end crashes as well.
OH the good old days!!!!