Have you ever had a mirage? Have you ever seen something, absolutely sure to have seen it, and than, a few moments later, you cannot see it anymore?
It happens to me in Scotland, some years ago, I was walking along the coast, it was foggy and a little bit rainy. In a moment, the fog has thinned out and, I saw it, a little island, just a few seconds to take the picture, before it comes again the fog. But after a few minute, when it comes the sun, I turn again in that direction, to watch it again, but it was disappeared.
