You probably are really being stalked or are simply misinterpreting the scenario. I highly doubt you are hallucinating an entire scenario of a truck with a guy getting out of it. That could only happen if you were SEVERELY psychotic and I emphasize severely because if that was a hallucination you would likely be way too far out in space to even be posting on this site. I can almost guarantee you did not hallucinate a truck with a guy getting out of it because to experience that you would have to be truly delirious which given the lucidity of your post you clearly are not.