I travel every day for work. I service fire equipment, so I have to go to fire stations all over Western Pennsylvania. Quite often, I go to stations where I have a key/door code, or they've left the door open for me, so no one has to be there for me to do my job. Sometimes, someone is there, and stays while I work. A lot of my customers will have someone meet me, open the door, make sure I have everything needed, then they go to their own jobs. I am very conscientous about making my appointments on time. Yesterday, I had to drive about 120 miles to the customer. They're up north a ways, and a lot of the trip is on a 2-lane, no passing zone road. I left with plenty of time, and was just taking it easy, until I got behind a beige Prius. The speed limit was 45, and he was doing a little over 30. I followed him at about 3 seconds for a few miles, and he was P&G ing, speeding up to about 40, then drifting down to 28. The clock was ticking. I did the Euro-standard "double headlight flash" as an indication that I would like to go around. He responded with a hand jesture. Ok, fine. I stayed at my 3-second distance, and kept creeping along. After nearly 20 MILES of below-40 travel through a twisty area, I finally got a passing zone (I absolutely WILL NOT pass in a double-yellow!). As I pulled along side, he yelled thru his window "Slow down, A-Hole!" I was nearly 1/2 hour late for the appointment. My contact was late for work. Thanks, Jerk.