I knew some drivers were stupid, but this guy takes the cake.  Coming up 4th Street in the left lane, a guy pulls up alongside me on the right and says, in a normal, calm voice, "Please use the bike lane."  I shouted after him in response, "What bike lane, moron?  There's no bike lane here."  He then stuck his arm out the window, index finger pointed down, toward the sidewalk.  Now, I know it's hard to tell the difference between the raised, white concrete sidewalk and a lane of travel on black pavement with pictures of bikes painted on it, but come on.