I usually ignore those graphics that tell you it's impossible to lick your elbow, or whatever the latest thing is that you supposedly can't do, then you try it and look stupid. But sometimes, if they're novel enough, and sound either totally legit or completely ridiculous, I'll try them.
I did not expect this one to work.
I'm sure there are some people who can overcome this and keep their foot going in clockwise circles while they draw a 6, but I am not one of those people. Fascinating!