Sentence:  We were merely observers, getting totally absorbed in some exciting movie, our palms all sweaty, only to find that, after the houselights came on and we exited the theater, the thrilling <WSD>afterglow</WSD> that coursed through us ultimately meant nothing whatsoever. 
Meaning of the word marked with <WSD> tags:  The mildly euphoric feeling experienced after a pleasurable experience, especially after an orgasm or drug-induced high.