Throwing stars and knives. Reusable and environmentally friendly too so probably not going to be banned real soon. The biggest thing is getting the right gee with badass logo on the back and make sure you wear a black belt for intimidation factor even if you're only a yellow belt.
Learn to shoot a bow too, if you can't then at least carry one for intimidation factor again.
If you want to go above and beyond then make a Zen garden or shrub sculpture. A mini desktop Zen garden or bonsai tree will suffice of need be. Asian Wall art is also helpful.
I had a had time believing that EVERYONE was Kung Fu fighting.
Beware of any old man in a profession where one usually dies young.
