Here's an old one

[chayton]

But thought maybe some of you haven't heard this before...

While sitting down lift your right foot off the floor and make clockwise circles with it. (or cross your right leg over your left and do it that way)
Now, once you're doing this, draw the number "6" in the air with your right hand. Your foot will change direction and start moving counterclockwise.

This works on a large majority of people...what about you?

 

[Tirilej]

I was tought to draw an 8. Maybe a 6 is more difficult.
I' will have to try that because an 8 is way to easy

 

[chayton]

An 8 would be easier because it's counterclockwise AND clockwise. Try with a 6 and see.

 

[Tirilej]

That was easy too, but I did get some problem with an 8 and a 6 though

 

[chayton]

I know someone who can do it no problem, but when they try it with the left side they can't. I was just reading about Jackie Chan, he was in an interview and made a circle with one hand, a square with the other, then lifted one leg and made a triangle all at the same time. I also once saw someone who wrote two different things with both hands at the same time.

That's pretty amazing to someone like me who has a hard time walking and chewing gum at the same time. Or talking and thinking.