On the way home, today, I was in line with about 10 cars, one lane over from the slow lane. We were all passing a mini van, in the slow lane, going about 50 in an area where the flow is up to 85 or so. We were all slowing down for the next off ramp, passing this guy, when he starts moving over on me. I can see about half his van in front of me. I step hard on the brakes and honk. He backs off, then takes another shot, with the increased space. I can see that he has just now turned on his blinker and is holding his hand out the window, telling me I'm number one. And this from a lane that is clear in front of him. So I move over into the slow lane, that's clear and take the off ramp, only this guy follows me, honking his horn and still pointing out that I'm number one. I slow down, he slows down. I speed up and he speeds up. He tailgates me and I move over and slow down. Finally I manouver around a couple of cars and take an offramp and see him go under the bridge with his nose down, brake light on and some tire smoke. People are moving away and giving him some space as he misses the ramp. I'm glad that I got away from him. I have no idea what he wanted. His lane was clear, and my lane had about 10 cars in it. How stupid can he be following me so close at 60-70 miles per hour. If things got really serious, I suppose my v8 4Runner could out run a first generation Dodge mini van, or I could stick my trailer hitch through the front of his grill with the brake pedal. But I'm glad it did not come to any real trouble. I was calm, I think, but my dogs were upset, and you never really know what something like this can lead to.