Let it go and don't let it ruin your day.
I listen to an ipod at it's highest level and usually don't notice people harassing me. I've been passed close enough to be hit with mirrors but once I'm passed there's not much I can do.
Believe me, there's plenty that I could do, and have done in similar situations,(though I've never been hit by an automobile), a mirror and the lack of an Ipod has been helpful. My day wasn't ruined, but I needed to take a few minutes of it to report the offending motorist.
A guy in a truck threw a bottle at me once but he was doing at least 40 and missed me by 50 yards. Someone else threw a cup of soda on me once. He was going slower and was able to get close enough to spray me.
I was passed by a motorist that missed me by a few inches, at a 40 mph speed "differential", I was still able to have the motorist and his vehicle documented with law enforcement.