If I plug myself as an artist wannabe, and pledge myself, hand on heart, fully to the aesthetic cause, then quietly ear-wigging conversations on the tube is n't that at all, it's actually a creative act: I'm constructing a collage of public speech fragments. How did I get here? The usual manner, bored on a slow tube rumbling under London, random excerpts of other commuters conversations swirling around me; some stick, and then it leads me to this. Boredom eh...