Air Canada flight attendant to passengers in Row 4 of a flight to Sydney Tuesday afternoon: "You are in the emergency exit row, so I have to show you how to open the emergency door." [Gestures to door handle.] "Pull it down. It opens in. Throw it out." [Pause.] "Any questions?" Airline safety instructions are so often wordy and prissy. How refreshing to encounter a  no-nonsense pro who understands the value of brisk, imperative prose, and isn't afraid to use it....