We were going along smoothly and all of a sudden a mountain peak seeme...wikipedia - 07 Nov 2020
We were going along smoothly and all of a sudden a mountain peak seemed to rise up out of nowhere up ahead. We looked again and it was gone. A couple of minutes later it popped up again rising some 300 feet higher than our altitude. We never seemed to get any closer to it. The peak just kept popping up and down, getting higher and higher and higher every time it reappeared.