The one rein stop, or the pocket stop.

Some people talk about the one rein stop being an emergency stop.
For me it's how I teach a horse to stop off seat.
I never use 2 reins to stop a horse.
Once a horse understands individual rein cues, and self carriage, I will start using 2 reins to work on shape, but not to stop.

[@kimbrink8383]

Thank you, beautiful.