No, I'm saying I would be in the passing lane, going faster than the speed of traffic, then I'd get tailgated by someone who decided the flow of traffic in the passing lane was too slow and change lanes so they could pass, just to watch them do the same thing to the car that was just ahead of me. I think if I edit this sentence it would be more clear:

He'd tailgate until I found an opportunity to drop into the middle lane, let him pass, then [I would] get back into right lane and watch him do the same thing to the guy in front of me.