On 9/28/2012 at appoximately 8:30 pm looking east towards Cass City, MI.,as I was letting my dogs out to do their business, I noticed a very low hum noise like a very low frequency bass, I looked across the back field of state land and this reddish/yellow whitish craft began a slow assend just above the trees. The object was moving very slow at a 60 degree upward angle, as it rose the hum noise increased in frequency like a start-up of a table saw at slow motion. I have been around choppers and this absolutely didn't sound nor act like it. The craft began gainning speed as the frequency of the noise pitch increased, then leveled off a bit in straight line, then shot upward at 50 degrees and vanished as if by incredible speed or like a light was turned off. My wife claims ( as she caught glimps of it before it shot off out of sight) that it was exactly like the object she saw at 4:30 in the morning when my dogs wanted to go outside at that time of morning, which was rather unusual. Even more unusual is the fact that in these necks of the woods, a craft of any nature is extreamely rare at 4:30 in the morning. The humming frequency of that craft I seen was a very unusual sound, I never heard anything like that, nor seen a shape like that, it was two inverted saucers with a sort of "tube" inbeteewn them each going the opposite direction. And that wrrrrrrrrrrrr was the strangest sound ever. I'm a skeptic big time when it comes to UFO's but this is the first time I ever seen anything like this, and I help build aircrafts so I'm well aware of them, but this was no aircraft, least not one I ever seen and I have seen them all.