"I wrote a song for Elvis Presley [but never sent it to him] it's called "Have
Mercy on Me, Baby." I was singing it to Jack, and he said, "I think we ought to do it
and see how it turns out." So we cut that. You ought to hear him play his guitar on
this thing! We were laughing at it, and I said, "Boy, what's Nashville gonna think of
this?" And he said, "I think you shook up Nashville two or three times, so don't
worry about it." And it's true. I have shook 'em up a little bit."