huge military cargo-style craft, hovered, no sound

I saw a very large aircraft fly across Birdseye Rd. at a very low altitude. It had huge lights across the front of it. It was headed straight toward me as I traveled up the road, then it made a left and crossed in front of me. It moved extremely slowly. Once it crossed the road it seemed to hover for a good minute. I got a very clear look at the object. It was silver in color (not painted) and it was just a huge object. I killed my engine and rolled down the windows to listen. As I did so, it began to slowly fly away and it was absolutely silent. I heard nothing. I tried to follow it, but lost it through the trees. It looked kind of like an A10 Thunderbolt. It did not appear to be a helicopter, although it is not out of the realm of possibility. It was so low and close, I couldn't really see the top of it. Keep in mind, Sikorsky aircraft is very close by. They test fly stuff all the time, but this is nothing that I've ever seen. Add to it that it hovered and was silent and had no markings (that I could see) whatsoever. I could see rivets in the metal, but I saw no markings.