My father was seconded to the Turkish army at the end of WW2 to instruct them in using Radar (surreal in itself in that he spent the remainder of his working career as an art teacher).

Once when strolling about in the streets of Istambul he stopped and looked up into the sky as if staring at something. After a couple of minutes someone else noticed and tried to work out what he was looking at without asking him. More passers by joined in. After a few more minutes he walked away leaving a small crowd staring at the sky. 20 minutes later he came back and found the crowd still there. When he asked what they were looking at there were all sorts of strange invented answers.