I've had a couple fun ones...

Nice summer night riding on a well-lit street:
Jock Jams In Car With Ugly Girls: "Hey tree hugger!!"
me: "uhhhhhhhh"
JJICWUG: "YOU ******!"
me: "uhhhhhhhh" so I catch up to them at the next light and flip the driver off less than a foot away from the car window. haha

Next:
Riding home from the park, nice summer night again:
Dudes in cars do a U-Turn at a light where I crossed perpendicular to them,
Drunk or ********: "Hey are you having a good bike ride uhhuuhhhuhh"
Me: "Sure am wang."
DoR: "****en bike ride mother ****en **** you ****ing **** ****er" as they drive off
Me: "Get a job ******-nozzle!"

Next:
Riding home from work:
Commuter guy stops at red light where I saw a gap and shot through.
I hear a "Never run red! Never run red! Never run RED!"
I yell "Sorry papa!"

good times