I think the speed limit is 65 on that stretch, right? You were doing 72. That guy has anger management problems. Maybe chemical dependencies to go with it. But you make a mistake in pivoting to return his plumage. You're not the old one [edit: "only one"] armed in Virginia. I had a friend get a gun pulled on her on I-64 once. Be careful out there.
[EDIT 2: I don't mean to judge... I have also lost my cool with aggressive people on the road... gave one the bird last year too.
I'm not proud of that.]