Makes no sense unless he had stolen the rig he was driving and wanted a different vehicle!!! I assume you were in your private vehicle.Alternatively he may have wanted to rob you. Worst case, he wanted to rob you and dispose of you as a witness.We are in scary times these days---

You are very lucky and fortunate the other car popped over the hill into view.Things coulda gone bad indeed--

The more tales I hear the more I realize the need to all and their loved ones to carry SOMETHING for self defense, day or night.We are rolling into a bigtime recession with signifigant inflation(watch the gas prices and everything related to petrol manufacturing go up and up). Watch--Those who consider themselves have nots will FORCEFULLY TAKE what they want from others.Not to alarm but everyone had Best be Prepared!!

I feel using your wits and carrying a handgun is part of a reasonable response.