I go to Egypt about once a year. One of my favorite things to do is ride horses late at night around the 3 pyramids. One night, while riding with a friend, we heard a very loud roar (lack for better words) at the base of Kufu Pyramid. I never heard an animal or human make that sound. Our horses had begun to rear up and took off running. It sent shivers down my spine. I wasn't afraid. It just seemed natural, considering I was in a country with an ancient history. Has anyone else had similar experiences in Egypt?