Tom Petty’s 1989 hit “Free Fallin’” is a simple enough song. It contains just a handful of guitar chords that any beginner could easily handle. As easy tunes go, it’s good for a laugh. And as it turns out, that’s exactly what Petty had in mind when he wrote it. He says he began writing the song spontaneously during sessions for his debut solo album, ‘Full Moon Fever,’ as a way to make producer Jeff Lynne crack up.