Massholes that pull out in front of you

I'm sure everyone has been cut off by someone while driving.  I hate it.  Sometimes it's not so bad if the guy drives faster than you.  However, this morning this guy (at a stop sign) pulled right in front of me, making me slow down.  I saw his face- he was trying not to get hit by me- so I know he knows he was in the wrong.  THEN, he finds his buddy and pulls to the side half a block up. Thanks Jackass.  PISSED ME OFF.