Most set ups are recognizable by your opponent...that by itself can partially hinder your capacity to execute the skill you’re trying to complete. By contrast, the #WristRoll set up is so unassuming and difficult for an opponent to read, it becomes as effective as a “cheat code”, something as close to automatic as possible, in regard to getting to the required and expected reaction to it. Once you do a wrist roll, 9/10 opponents will reach with the opposite arm, be ready and be in level change mode as his arm is going up...that is your opening, and that is your opportunity to attack the leg of your opponent w/o his/her lines of defense to impede your leg attack.