Suppose at your old boarding school the headmaster comes in one afternoon, huddles everyone up, and tells you:

Tonight instead of the usual re-heated airplane tray frozen dinner meatloaf fare, with slopped cups of orange fizz soda we will be having

roast venison with cerise sauce, grilled asparagus tips, wild rice pilaf, field greens salad with raspberry vinaigrette, and for dessert a delicately made tiramisu and organic cappuccino.

And then adds after a significant pause, the word...QUACK!

Get it?