Drivers in back of me. Right in back of me. On my tail, even.

Drivers in front of me who go 10 mph below the posted speed limit.

People in express checkout with more than 25 items

Bicyclists who want to be treated with respect who then run right through red lights and stop signs

Parents who constantly tweet or Facebook about their children's bodily functions

People who constantly tweet or Facebook about their own bodily functions

People

Grapes

Other: