I'm driving home from a vacation trip.  Speed limit is 65, so I'm doing 70.   Cruise control is on.   I'm slowly creeping up on the guy in front of me.  He apparently has his cruise control set on 69.   So I move to the left lane, press the gas slightly, go around him, let off on the gas and go back to doing 70.   Well, here he comes.  Now, apparently, he has set his cruise control on 70.1.   He's in the left lane, just hanging there, ever so slooooowly creeping past me.  I feel like I could reach over and shake hands with him and have a conversation.   And then when he gets back in front of me, he apparently re-sets his cruise control on 69.     

 

That is really irritating. 

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