Aggressive driving

There was an old man driving in a white pickup truck behind me for the largest part of my drive down I-65 south today. He continued to ride my tail and get upset with me. Eventually, when I would need to pass somebody, and change into the left lane, (the lane he occupied constantly) he would turn his high beams on and speed up until he was only a few feet away from my bumper. He would then back away, then turn on his hazard lights. After a few more seconds he sped up again, and was riding my bumper.

As soon as I was able to get back into the right lane, he got next to me and just looked.

I don’t know why this has had such an affect on me, but I am still bothered by it. I would love to go and visit him to ask him why. I just want to know what was going through his mind.