People who get in the fast lane on the highway and go about 10 mph less than the flow of traffic but STILL refuse to move when you are behind them even though they have an open lane. Then when you cut into the right lane to pass them they speed up.
One thing that drives me insane when I'm driving from NM to Cali on the 2 lane highways: everytime I come up in the left lane on a couple truckers the one in the back waits until I'm about 5 secs from passing him then decides to cut into my lane to pass the slower truck in front of him, so I end up sitting behind this slow driving jackass trucker for about 5 miles...they do it on purpose I KNOW THEY DO!!
'00 Blk CSVT #1087/2150 built 12/23/99
