Timing is as much of a factor as anything in the effectiveness of OC Pepper Spray. It is generally most effective if applied before the fight is on as a "goal oriented" subject will not stop just because he can't see straight or experiences pain. For too long, OC has beeen referred to as "Karate in a Can", implying that it would handle even the most violent subjects. This has been proven time and time again to be a myth.