Road Rage

I had an episode of Road Rage last week. Normally I don't get all up tight about crazy drivers but this one lady triggered something lurking inside of me.

Ok, let me set up the scenario: I am getting off of the freeway onto a street where the speed limit is 50mph and I have my blinker on to move over a lane. There is a car one lane over and slightly behind me and I am slowing down so that this car can pass. Meanwhile, this other car decides NOT to see my blinker and is speeding up behind the other car I am allowing to pass. But I am about to miss the street I need so I just move over, and this woman starts flipping me off and she is trying to be all sly about it by holding her hand low and barely over the steering wheel! So, this is where I normally just smile and wave at people or shrug my shoulders and say "Whoopsi?!", but this woman was older and I was appalled by her lewd behavior, and I wanted to teach her a lesson, so I step on my brakes and I am yelling and doing the same lewd gestures and this lady (perhaps I shouldn't be calling her a lady??) decides that I am crazy and moves over 2 lanes and speeds by flipping me off the entire time. I would have followed her if I had been alone but I had some people in the car and I think I kinda freaked them out as well.
So, what was it about this woman that threw me into such a rage? Hard to say.