I was in a very rural area of the rown of Vanore, TN. I was sleeping in my truck outside next to farmland. Very little light polution (Maybe 5%). Crystal clear night sky, April night. 55° Got out of my truck to evacuate, and looked up and immediated saw this huge vapor-trail from something moving at an insanely high rate of speed. It literally covered the entire sky in about 3 seconds. Huge plume left behind. Very quiet. No sound or lights. No glowing object. I could barely track the path with my head turning to follow it. It zipped acriss the sky THAT FAST! I could however actually see the plume cloud rolling in on itself as it expanded. It too was gone in a minute or two. I've seen shooting stars before, but this seemed much lower and closer to earth. I suppose it could have been a meteor etc...but I didn't see and light or steak of light towards the front. Perhaps I missed that part. All I saw waa the contrail or vapor trail it left behind. And it swelled VERY FAST and was churning very rapidly.