Sentence:  I was intrigued by the exchange in one of the opening scenes where the Warden says to Snake: "You flew the wing-five over Leningrad, didn't you?" It turns out to be just a <WSD>throwaway</WSD> line, but for a moment it worked like the best SF, where a casual reference can imply a lot. 
Meaning of the word marked with <WSD> tags:  Disposable; intended for a single use prior to being discarded.