We all have a built-in weapon system we rarely use. It's called anxiety. We are taught that anxiety is something to avoid. That emotional experiences such as fear, trepidation, or stress, are contrary to living a happy life. We are also told that in threatening situations, anxiety should be quelled. This is not true. Realise that a key to success in a threatening situation is to use your anxiety to increase your sensory input with information vital to your survival. Understand how to manipulate the anxiety of your aggressor, denying him critical information he will need for success.