Re: How did this happen ?
The only thing that I can think of is that most Nikon's have a so called "Multiple Exposure" option - some with 2 and some with 3 shots. So, this would be a 2 shot multiple exposure shot ...and - when you do use it on purpose, it only does one set ...and you have to tell it again ...so that would fit here as well.
Re: How did this happen ?
Thanks. Must have been something like you said, even though it was not done intentionally.
Re: How did this happen ?
I hope you don't mind but I moved this thread since it wasn't really a photo critique request. My first thought was that it was shot through a window and the sphinx was a reflection. But if that sphinx image was shot right before the obelisk image, then llewpics is probably right. Maybe you should take a look at the camera menu and see if a double exposure is really possible and how it's done. That way you can show your wife how to avoid this mistake in the future.
Re: How did this happen ?
Hmmm yeah those are some pretty good looking photos. I do like how the sphinx looks so majestic in the photo and makes the viewer seem so much smaller than they felt before they saw it.