As Russell guided us along the main thorough fares and the back alleys of the Mission, I got to experience, for the first time, an amazing street art "underworld" that I'd walked past so many times, but never stopped to really notice -- or in many cases, appreciate. Throughout the tour, Russell was a wealth of knowledge and anecdotes. We got to hear insider stories of the greats like Banksy, Rowa, and Adam5100 and learn about the unique communities and implicit rules of the complex and chaotic street art world. And we explored, together, the nuance between creation and destruction, artistic expression and just plain vandalism. It was a beautiful tour. One that will forever shape my perception of a city I thought I knew pretty well.