... cars 'hugging' the lane toward me when i'm splitting lanes.
... jerks yelling at you when you went by them.
... cars decide to clean their windshield when i'm behind them.
... cars changing lanes without using their signal.

but the smile on my face quickly returns once i remind myself i'm on two wheels not four!

i love it when the car in front of you for no reason rides with their tire halfway off the road on the dirt shoulder. especially when you cant pass and they do this the entire time they are in front of you. sweet. i needed to get sandblasted.

don't forget the ever popular cigaret butt chucked out the window at highway speeds... nothing like a nice smouldering projectile to smack you in the hemlet or on your nice leather jacket.

Need a sticker on your bike that says "Quit yer bitchin. If you can't beat us, join us." Then again, I don't think I would want some of those psycho losers who have yelled at me out there riding on two wheels. Perhaps an intense anger management session......