Seated in a chair, raise your right foot from the ground and start moving it in a clockwise circle. While continuing to move your right foot, extend your right for finger and draw a figure 6 in the air. What happens?
See here for a YouTube video about this surprising effect.
It appears on lots of web sites, often under the title 'How smart is your right foot?' but I hadn't come across it before.
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Hi Richard
This is brilliant. I love these weird teasers. Why does this happen ?
Judith