TOP, TWO PHOTOS ON LEFT: If you thread a lead rope through the ring on the left side of a horse's halter and pass the loop in the line under the animal's upper lip, a jerk on the rope will get the critter's attention. TOP, RIGHT: A twitch's loop is slipped over a handful of upper lip. ABOVE, LEFT: Stand to one side and hold the twitch firmly. If necessary, two people can grasp the horse's ears, hold its head down, and cross their legs in front of it to keep it from striking forward. ABOVE, TWO RIGHT PHOTOS: The "skin curl" and the "same-side leg lift."