A couple of Sundays ago I'd ridden from SJ to SF and was in the downtown area. I forget exactly where, but there were 3 lanes all turning left. I was in the 2 lane behind a white taxi, and a mongo RV towing a red car was in the 3 lane. Just as we got to the bend, the RV cut the corner into the 2 lane, and even though the taxi braked, the right front of the taxi clipped the left rear of the red car. Or maybe the left rear of the red car clipped the taxi. The taxi driver just kind of threw up his hands and continued behind the RV. I was able to pull alongside and see the red car now had a white quarter panel, so at the light I got the RV driver to roll down his window and I told him what happened. I don't think he had a clue. Watching through my mirror, I think the RV decided he really didn't want to deal with the taxi driver as the RV kept going. Those things are really long as it is, and when they're towing a car I don't know how the driver keeps track of where everything is. I learned that I should keep my bike far away from RVs towing things. Ken