Gee, all that 'trainer' taught that horse is the way to get him off is to rear and spin, and when he gets off, to be afraid.
"The Man Who Listens to Horses" by Monty Roberts can show the difference between 'old-fashioned' training and 'natural' training. Monty's Father was an 'old-fashioned', impatient, abusive trainer that was definitely set in his ways. His son, Monty, is the famous horse trainer that can take a wild, unhandled horse and have him accept a rider in under 30 minutes, gently. These two trainers are starkly different, but they achieved the same result, a saddle-broke horse. The difference between these two extreme techniques is that one produces a robot of a horse and one produces a horse with its natural spirit maintained.
Toofine - 1998 Half Arabian
Minnie - 2013 Morgan