At the weekend I attended a car show at Rockingham Speedway, and in the middle of the day, everything stopped and the announcement came over the tannoy to "look to the sky". Everyone (with the exception of my eight year old daughter) did so, and were treated to a special fly past by the Red Arrows no less.
When they had gone (and the whole thing took less than 10 seconds) my little girl asked me what that was, and would they be coming back at all because she had missed it???
http://www.raf.mod.uk/reds/