You never forget about things you've done that you know you shouldn't have done. They hang around your mind, linger like a thief casing a joint for a future job. You see them there, dramatically lurking nearby in striped monochrome, leaping behind postboxes as soon as your head whips around to confront them. Or it's a familiar face in a crowd that you glimpse but then lose sight of. An annoying Where's Wally? forever locked away and hidden in every thought in your conscience. The bad thing that you did, always there to let you know.