Note for the folks at home: As all of my knowledge on traditional bull fighting is second-hand (at best), I can't guarantee the accuracy of any of this additional information: bull fighting is a tradition of the Luhya tribe, which originated around the Kakamega region in western Kenya. The fight is not to the death; a winner is decided long before one of the bulls dies. The bulls are, according to all of the sources I can find, given controlled substances, but my colleague (pictured above) is the only source attesting that this substance is Marijuana, and not some form of traditional alcoholic brew.
And a note for mom: please ignore the image of two high bulls above.