I have also been having some very strange dreams myself, a lot of them are very morbid. I had this dream last night about a boy who decided to become a serial killer, so he grabbed his fathers shotgun and started wandering around with it to find someone to shoot. While crossing the street he playfully aimed it at this other child a few yards away from him, the other boy had his back turned so he had no idea what was going on behind him. The boy with the shotgun eventually made his way through a citrus orchard, stumbling upon a farm laborer picking oranges. As soon as the man turned around to face who was approaching, the boy shot him. I woke up after that, dunno if you could really classify that as a nightmare, I wasn't that distressed by it. Well, now that I think about it, I am a little distressed by having dreams of this nature