On a flight SYD-CHC a few years back, as we crossed the west coast of NZ, we were informed by the slightly effeminate male Pursar that we would shortly be "Passing over Ass...I mean Assing over Pass, I mean, Passing over Arthurs Pass!".
Seemed to have been an unintentional faux pas, but it had a few of us looking at each other to see if we'd all heard the same thing.