While the program's initial function was to straighten unruly individuals into upstanding citizens, Edna took it further by controlling applicants with a wristwatch that turned wearers effectively into zombies. Activation of the code X:11 on the watch's digital display would place the user under hypnosis, and in her control. Biff Tannen, being the most unruly individual in all of Hill Valley, was the first to undergo "treatment". As a result of the hypnosis, every time he felt the urge to break a law or his emotions turned to annoyance or anger, he would get a sensation of acute nausea.