Yichin. There is something seriously wrong her. The dances go anti clockwise.
A Progresive chasse and Quick Open Reverse still move anti-clockwise.A skilled dancer may move clockwise for a few steps . In the main to avoid a crowded situation usually on the short side of the ballroom. Not to be tried by the none experienced.

Perhaps in the southern hemisphere....

Phil. I know the water goes down the plug hole the wrong way in the Southern Hemisphere. But the Quickstep does not.

Don, Thanks for advice.
I understood anti-clockwisd massive movement diminishes crash . So , in crowded floor , we obey this rule . But may clock-wise choreography be allowed in showcase ? I do think so . why not ? If only one pair of dancer on the floor ? Without variation without development .
My question is based on that : Luca commenced backing DC against LOD down against LOD, then moving along the center side with a lot of diagonal angles arrived wall side. He treated progressive chasse less side movement because of followed by quick open reverse turn, he should avoid lady behind him or he had to let her infront of him on effort on next figure. So lady let body move forward and let RF catch it on first quick . They squared and back the point between LOD and DC, Luca mentioned that lady backs DC ( on second q ).( the second clue I had such impression. ) My problem is that I hope to have correct concept , so I ask. In this case,I did not confirm what I saw and understood in net video clip especially there was limited angle and evidence of environtment or explanation.
Thanks.
ylchen

Anyway, you provoked me to search what I want to know.
Positively, now I got a roughly explanation of Corriolis Effect. Not bad.

ylchen

Yichin. On a video sometimes the alignment can be deceiving. On an empty floor with you watching. If the couple are close to you with the man backing they will appear to be going clockwise. Put them to the othe side of the hall, dead opposite, they will be going anti-clockwise. Clockwise, don't try it otherwise you will run out of floor space when you reach the end of the floor. We don't have any Show Case here. But in a demonstration anything could happen.

Thanks Don.
Although I am still puzzled, it is better to move anti-clockwise .
About the spiral in Latin, I am not going to have lesson .
(My daughter asked me to teach her Latin after I showed her the rumba forward walk, . I said I can't. I know nothing about Latin. But I suggested her to get some important concepts prior having lesson with someone to save time and money. I bought Latin techique & Muscular exercise by Shirley Ballas for her reference. When she have lesson with a good teacher ( It is hard to find .), she can teach me step by step. I am too old , I set my aim at " correct ".)
I prefer to throw myself into standard ballroom dance. Waltz exhausts me: a series of figures needed gather / release much more energy , swing far... I tried my best to follow all his(my new coach ) instructions . Fortunately , he danced foxtrot with me intermediately. Tonight I will review what I learnt at home.
ylchen

Yichin. Its a good ldea to forget the Spiral. Pass on to your daughter that in a Rumba Walk the feet do turn out. But Keep the Knee pointing the way you are going, that is to your front. Don't let the knee follow the line of the turned out front foot, not even slightly. I wish I had been told this a long time ago.

Last noon, I reviewed the mentioned clip again. it really ran clockwise . The answer may be only half floor occupied . started from AD-> half DC-> toward the wall side , along the LOD BC , arrived AB. So, after this 8 bar combination, the next will be the right turn series moving anti-clockwise as usual. So, it is reasonable.
I wondered , while working on Tango, which beat man will commence his first step besides arriving on beat 1? I am desired to read much more posts regarding music here. Thanks.
ylchen

Yichen. It is a good idea to understand the difference between a 2/4 Tango and a 4/4 Tango. The music by tradition is supposed to be 2/4 That is two beats = one bar of music. In 4/4 four beats = one bar.What has happend is the general public do not like 2/4 Tango. People like a vocalist and 2/4 is in most cases not suitable. One leading German orchestra leader was asked this question. Why are you recording 4/4 and not 2/4. The answer was they had to recall and re record a 2/4 to a 4/4. If you dance a basic routine to 4/4 That is Two Walks . A Progressive Side Step. A Walk. And a Link. You are now out of rythm with the music. In 2/4 it doesn't matter. I asked a Lecturer if you dont know what is going to be played how do you manage. The answere is treat every Tango as a 4/4. But be very carefull with the choreography. Don't do the above group. The same thing can happen on a Four Step which goes beat wise q q q q which is 1234 Now you will be stepping off on 12 instead of 34 if a 4/4 is being played. Good Luck I hope this makes sense to you.