Driving to work, I decided to move from the right (slow) lane to the middle lane to avoid a slower vehicle. Before doing this, I checked both side mirrors as well as the rear-view. Not seeing any vehicles in the vicinity, I changed lanes. Once in my new lane, I looked in my rear-view to find you a scant few feet away. It was obvious that you were running considerably faster than the other traffic. Being a motorcyclist myself, I was shocked and ashamed that I came so close to taking out a fellow rider! As I tried to figure out how I failed to notice you, you came up on me in the left (fast) lane. I was sorry for my apparent inattentiveness, but unsure how to express that while driving down the freeway. Then you moved your helmet in an "I'm-staring-mad-at-you!" manner and shot me the finger!