Based on feedback from the horse

"The good riders and trainers know that riding is not about mechanically applying a particular set of aids. They understand that since shades of meaning can change continually for a whole range of reasons, they can never quit riding when they are in the saddle. They must ride every stride mentally and physically. They ask the horse for a stride. Then, based on feedback from the horse's response to that asking, they may ask for the next stride by applying the same corridor of pressures exactly the same way.."

Mechanically speaking, for example, the corridor of pressures used for a figure of eight at a walk, trot, or canter are the same. But, practically filming, Sam Renseiw just translated a simple corridor with three horses on track. Enjoy the moving "still" by clicking here or try the pace above.(patafilm #205, 00'50'', 3.7 MB, Quicktime/mov - Flash version here)