A similar thing happened to me years ago on the NJ Turnpike at night. It was three lines wide at that point, when a cop came onto the highway and merged into the right lane doing 55 MPH on the dot. A pretty clear signal as to his now being on the hunt.
Everybody around took the hint and dropped down to 55. I was in the left lane (doing about 75 MPH…) when I saw the cop coming onto the highway on the on-ramp, so had time to drop down to 55 by the time he was on the highway, such that I was the only car in the left lane for some distance, about even with the cop two lanes over (and not passing him, of course).
Most of the people behind me went so far as to merge over into the middle lane. I was about to join them, when some guy in a yellow sports car came tearing down the now mostly empty left lane at around 75-80 MPH. He pulled up behind me and tailed me close… Then flashed his lights a few times. I tried gesturing with my hands “dude, look over two lanes”, but I guess he thought I was flipping him off because all he did was flash his brights again.
Fine, have it your way. I slowed even further to 50 MPH to fall back enough to merge behind the car to my right (which earned me some more high beams and a horn, even as I was signalling with my right blinker), and as soon I absented myself from the lane, he floored it and must have been doing around 90 MPH when suddenly he saw the cop car in his rear view mirror.
He slammed on the brakes and moved all the way over to the right lane doing 55, but it was no use. Though the cop waited for him to tuck tail (and about a minute of squirming in the right lane) before turning on the lights and sirens to go over and pull him over.