I was a passenger travelling on hwy 26 in S. Idaho, toward Arco. I wanted to take a picture of a US Government installation hidden behind a hill. As I pointed my camera toward the hill, which was now behind us, I saw two shiny objects moving in a straight trajectory away from the Government compound. I zoomed in with my phone camera and took a picture. To me the shiny objects looked like they were on a truck bed. I took a couple more shots of the objects. In one of the pictures I could not see the objects on my screen, even though I could see them with my eyes, so I aimed carefully and took another picture. In the remaining pictures I can only see the objects in the picture that doesn't have two strange, nearly vertical anomolies in the pictures. In the picture where I can see the objects, they are no longer on any supporting truck-like object. It was about this time that the objects took off at double the speed they had been going before. The shiny objects continued to 'fly' above the ground in a straight trajectory. Then, we drove around the bend in the road and I could no longer see the objects.