Expressions of regret at missing a chance to score require, in almost all circumstances, contact
between (a) one's two hands and (b) one's head. It is never appropriate to employ one hand only to
demonstrate one's dismay and/or wrath. Parts of the body other than the head may be touched, but
only after manual contact with the head.
There's a odd aspect of history that I'm often drawn to think about. It's the
degrees-of-separation game extended through time. Consider this as an example: I know a woman who
as a teenager in Jamaica met T. S. Eliot, whose grandmother she lived next door to him in St. Louis
remembered her great-uncle John Adams, who once, when living in Paris, met Voltaire at the
theatre.