"A white Ford pickup pulled up to cattle pasture near Ponca City, Oklahoma, in early Fall 1971, and stopped at a gate. Karl, Mark, and Gordon worked for cattle feed distributor and were sent to this remote area to pick up a feeder. What they found there has kept them silent for 41 years.
“We opened the gate, which was barbed wire with no lock, and entered,” Karl said. “We went on the property, which was covered with grass up to and over the hood of the truck.”
They drove through the tall grass to the tank that sat close to a red barn and got out of the truck.
“We realized the tank was almost half full and too heavy to load,” Karl said. “We decided to leave and drove around the red barn and we saw a large, two story white house, with no lights in front of us.”
The trio drove back to the cattle feed company and the boss said he’d drain the tank and they could pick it up tomorrow.
“We went to the location to retrieve the tank the next night,” Karl said. “This time we decided to go through the old white big house on the hill and brought our shotguns.”
They drove onto the property over the path they’d made through the grass the day before and loaded the tank. Then they pulled around the barn toward the house. What they saw burned into their memories.
“It was no longer there,” Karl said. “We walked up the hill where it stood and there were no signs of demolition, no foundation, nothing at all. What we all seemed to witness the night before was no longer there. We have talked to each other over the years but none of us can begin to explain this vision.”====
http://mysteriousuniverse.org/2012/11/cases-of-time-slips/