WWE.com has an interview up with Wade Barrett talking about his elbow finisher – “The Souvenir”. Barrett says he used the move back during his bare-knuckle fighting days.
“It’s a variation of a knockout blow. In bare-knuckle fighting, you’re always looking to disable your opponent as quickly as possible. I have gone back to my roots as a fighter and it was something I wanted to bring into my arsenal. Wasteland and the Winds of Change are still there in my arsenal. I just think people are more intimidated by the prospect of getting an elbow smashed into their temple than the prospect of a slam.”
Quick Quip: From what I recall, Kassius Ohno uses a similar move in NXT, based around his entire gimmick. I don’t really know how that slipped through the cracks.