Driving south on highway 6 leaving Wiarton, I noticed an object in the sky ahead of me (SSE sky) and only a few miles ahead. It was flying really low and the sun was reflecting on it. I assumed it was a plane leaving the Wiarton airport, but the object was shining like stainless steel and was oval-round, maintaining a low altitude and slow moving. I then figured it was just the way the sun was hitting it that made it look odd shaped and like stainless steel. Seconds later, I was stopped at an intersection (Hwy 6 & Grey 17), waiting for cars ahead of me to turn, following the slow moving object in the sky when it just disappeared. No clouds, no sun change, no quick takeoff out of my view, it was just gone. Literally disappearing before my eyes. It could not be explained, it made the hairs on my arm and back of my neck stand up, and it really left me perplexed.