Yup. A couple weeks ago, I was driving on the highway and a truck/van with really bright blue lights started tailing me, so I switched over to the next lane ASAP and looked behind me after two seconds and the truck was gone. There was no exit within two miles and it didn't pull over, either. They also had not sped up ahead in front. It was really weird. The only "logical" explanation could be that it literally veered off of the interstate and into the forest lining the side of the road, but I doubt that

I was shook. There were only three other cars on the interstate with me at the time and they were all cars, not trucks/a van like that one had been.