i've never tried this before :-)
ok, i'll start a workshop in Arles this summer...
we need a supply of spinnable children and strong photographers with heads that do not easily spin.
shutter priority, 1/15th sec, 17mm, 50cm focus,
hold the child and spin, someone holds the camera above your arms, pointing down, spinning with you. you direct the shooter to trigger when the direction is good both with regards to composition and to the direction of light. fire away.
please post your experiments to the spinners and saints group