There I was last night when I came up on a guy who was tootling along around at 10MPH, so I passed him with a "Hey, nice night to be out". No response, just stared straight ahead. Okey dokey, whatever.
Then he discovered his legs and got on my wheel at 20MPH ( which is, admittedly, fast for me, especially at night ) and started sucking my wheel for a couple of miles. Until we got to an intersection with a red light, when he went around me, pulled a left through the light as a car to the right on the cross street was turning left, forcing the car into my lane to avoid him, which of course put me in a direct line for a head-on collision. Thankfully, the driver slammed on his brakes in time to avoid killing me.
Then the driver screamed at me while we sorted out him getting into the correct lane. Meanwhile, the other cyclist tootled on again without a backwards glance.
I think I win the "Meets unfriendly cyclist", "Silent wheel sucker", "Cyclist blows through a light", "Motorist yells at you inappropriately" and "Brown cycling shorts are very functional" award for the day.
Then I went home and had ice-cream.