I read USns Ewe-ess-ens, too.

We really must work on our delivery. If I caused someone to brake suddenly, and he yelled out with a warm smile and a twinkle in his eye [or the arched brow of the mycterismus], "Nice driving!" I would catch the irony in his statement and wouldn't feel wounded. However, were the same set of circumstances to occur, and he yelled out the window with a scowl on his face and perhaps a fist extended or some other such manual maneuver, "Nice driving!"--well, no matter how thickly British his accent might be, I'd take that as sarcasm.