OMG! I had an old German Friend who was the worst driver I have ever known. He would pull up behind someone, decide he was going too slow. Then hit the brake and slow down, wait for the guy to get a mile ahead. Then put the pedal to the metal and pass the guy at about a hundred miles an hour, only to cut in front of him and hit the brakes to resume a decent speed. Never saw anything quite like it.
I had a guy do that to me while on my way home one night. He was going slow so I passed him; he passed me then slowed down again. After doing that a couple of times I was getting POed so pulled over and stopped, because I know that I can get pretty ignorant. After pulling back out I went a couple of miles and he was sitting there waiting for me. WTF? We played cat and mouse again, then I decided to pull into a store and get cooled off. Like a dumb-*88 I put on my blinker; he pulled over and blocked the parking lot entrance. I should have ended it right then and there...
I'd been gone for 12 hours and just wanted to get home, so I kept on driving.
10 miles down the road he came flying up behind me and started riding my bumper with his high beams on. By that time I had no cell service so couldn't call for help if I had wanted to. However I knew that I was coming up on a woods road that was plowed, and started gathering things together as I drove; my flashlight, compass, heavy coat, shotgun & shells, cell phone... My plan was to turn onto the woods road, and if he followed me I would try get ahead enough to jump out, grab my snowshoes from the back, leave him the truck and head for a hilltop 1 1/2 miles away through the woods. From there I could call the cavalry.
As I approached the road though he went tearing past me and I never saw him again.