I saw this on FB and want to share it here. The reason is that this couple exhibit a broad skill in dance first and then one in ballroom second. I don't know of any other ballroom couple that could pull of this routine - I'm reminded of the ice dancers, Torvil and Dean, in their dance skills and expression.
Vernon Brock and Linda Dean, 1981...
http://www.youtube.com/watch?v=aeG2Jlp_FvI&feature=player_embedded