got to view the individual frames (just took a quick drive home ) anyways the individual frames viewed sequentially frame-by-frame only go in one direction!
...also got the image to change direction at will by covering the main image for a few seconds and concentrating on the reflection as suggested in some posts.
i watched the extracted frames, played in constant direction, and i could see it both ways.
i concentrated on the lowest foot and could switch very easily the direction.
and now i could even see her making only a half turn and each direction and waving with the outer leg from one side to another. wow!!
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another thing is:
if you see her turning clockwise, your view comes slightly from obove (looking down).
if you see her turning counter-clockwise, your view comes slightly from beneath (looking up).
what's sure is that it only depends on your (current) psychological state, in which way you see her turning (it's not a technical fake).
but another thing is if that's really telling about a higher right- or left-brain activity. (i can imagine it is)