Bikendo?

Oregon -- A fellow called 'Nature Boy' from Portland, allegedly a longtime practitioner of karate and tai chi, has apparently come across the idea to develop a specific self defense technique for people who ride bikes, using the bicycle itself as a tool for fending off attack.

He has been working on creating particular techniques using bicycles for several months, according to bikeportland.org. Recently a group of 16 bike riders were introduced to the 'wheelie' new art of bikendo.

Cool idea. I do wonder if it shouldn't be called bikempo though - rather than bikendo :-) You'll be the judge of that.