Have you ever experienced the mental, musical phenomenon of a song or melody line, seemingly out of nowhere, popping into your head and pushing whatever else had preoccupied your mind to the deep back burner? Perhaps, while you're busy doing something menial or mindless, and then, all of a sudden, wham, there it is--a hook, a line, a lyric, or a phrase from some tune or jingle--front and center. This is a regular phenomenon for me, and I decided to include in this week's show several recent examples of this "out-of-nowhere-wham-experience," as I call it.