Word’s around that some of my friends in language teaching are into conversation analysis. (I only know through hearsay because I’m afraid to talk to them anymore.) They record everyday conversations and analyze them carefully for whatever linguistic phenomena they think are important: length of turns, interruptions, communicative strategies, or occurrences of the word “paradigm.” Think of it as a linguist’s drinking game (“Three hedges in one turn! Six shots!”), but usually without the drinking.