I came up behind a driver on a 3 lane road. We were in the far left lane. The first things I noticed were the erratic speed, and drifting back and forth across 2 lanes, nearly hitting other drivers. Then, I noticed that her right hand was busy with constant hair floofing--stroking it, running her fingers through it, fluffing it up, and combing her fingers through it until she was holding it by the ends, straight out from her face.
I decided (after she had stopped suddenly a few times in front of me) to get around her, and made my way to the far right lane. As I passed, I glanced at her. Her right hand was busy with her hair, and her left hand held a phone. I think she was driving with her knee. She was looking down at the phone the entire time I was passing her.
Unfortunately, I had left my phone at home.