If I had to pick the best, single expletive ever, I imagine I would choose the word "shit!" It's short and rolls crisply off the tongue. It seems to sum things up in a wondrous thimble. No need to parse or dissect its origins. It just works.
-- Between the lines, a BBC article admits it doesn't have a clue as to the origin of giving something or someone the finger. Certainly it predates road rage. The Greeks and Romans used it. An analyst suggests it's a phallic gesture, though what is derogatory about a phallus I'm not quite clear. Anyway, there it is ... another thing that seems to work in the cranky-making situations where it is employed.
-- Advances in neuroscience mean that the face of warfare may be changed forever, a Reuters article suggests. Not only can mapping the mind be used to appreciate and perhaps cure disease, but that same mapping may lead to a reconfiguration of weapons and their uses.
I guess for every woo-hoo there's a "oh shit!" in the wings... and vice versa.