just saw advertisement of aikido 3D for iPad. you could just load up the app and show your attacker(s) the techniques that you are planning to do on them. that would scare them off right there and then. don't forget to use your Glock as the pointer.
The all new Glock lazer-pointer! For all your presentation needs! Enter your sales meeting with renewed confidence as people suddenly see things your way with the kind of clarity only a Glock product can produce!