Armstrong's Elbow

I was out on my road bike this afternoon -- after spending all day re-installing Windows, AGAIN. Pedaling along the Arboretum bypass route i came to a spot a block or so from E Madison St where the road briefly narrows due to traffic calming (a great idea!). Right as i started to move left to avoid a pothole in the narrowest spot, a guy on a carbon fiber racing bike silently appeared about 3 inches off my left shoulder -- this guy thought he was in the pelaton and i was Jan Ullrich (i wish) standing in the way of his yellow jersey. It scared the daylights out of me. We each had to react fast and pull off hard to avoid a collision. Clearly both of us had good reactions and bike handling skills. If it HAD been the pelaton this guy would've gotten an elbow in the ear for sure. I said, "Jeeze, say something when you pass, i almost hit you!". What i didn't say, didn't even think clearly, was that i was pretty rattled by his crazy, dangerous maneuver. He looked at me and smirked and with a pretentious attitude said, "You wouldn't have..." I was an obstacle. It was all about him. He was just too good to be even talking to me. I told him he was crazy and dangerous. He rode off yelling abuse at me. This guy was as bad as the clueless SUV drivers who think no one else on the road matters. In fact, i bet he IS one of them.