I’m assuming from this image I found this weekend that one is meant to use the “How To Use Jiu Jitsu” book itself as a means of self-defense!
Editor at Retroist
Searching through the alleys for useful knowledge in the city of Nostalgia. Huge cinema fanatic and sometimes carrier of the flame for the weirding ways of 80s gaming, toys, and television. When his wife lets him he is quite happy sitting in the corner eating buckets of beef jerky.