Steve: I don't think he was hoist by his own petard (one of my favourite phrases, by the way), but being as true to himself as he could be - giving us enough information that we could read between the lines: I reckon it was this:- 'I am paying my respects to my instructor, by passing on his method... but I am teaching Tango for the love, and don't want you to be led astray by this thing that, frankly, I would rather you didn't know.' Bless.... OK, it was a waste of time and money, but he taught it in such an embarrassed and responsible way that no harm was done; and he does more than enough free, extra-curricular stuff for us to have made up for it. I'd still love to know if it actually does have any useful purpose though.... Re: Improvisation/patterns: Our entire cognitive and sensory apparatus is based upon forming patterns, so we'll naturally do so in TA to some extent (and some 'moves' go really well together - better than any of the alternative permutations). It's like 'No - It Must Be Pure Improvisation' is the highest peak to be aimed for, but in reality.... I take it to be a bit grayer: 'Don't get too attached to the completion of your molinete, son, because anything could be cruising into that arc, at any point - be prepared to spontaneously adapt immediately, at all times'.