Lift your right foot off the floor and make clockwise circles.Now
while doing this draw the number six in the air with your right
hand.Your foot will change direction and there is nothing you can do
about it

Counting Silently

Count silently in your head by imagining that you’re saying the
numbers (most people count this way, but some count by imagining they
see the numbers). Try to say something out loud. You’ll almost
certainly lose count. Now count in your head by imagining you see the
numbers (I picture then flying by). You should now be able to speak
without losing count.

Standing Against a wall
You cant stand against a wall (without support) if both your feet
are parallel to the wall and connected to it

Rotating Index Finger

(Doable with a bit of practice) try to simultaneously rotate the
index fingers of both hands in the same direction (clockwise or
anticlockwise). Do it slowly at first, then faster, and faster….
Pretty soon, they’re going in opposite directions.

Sneezing with Open Eyes

Cant sneez with eyes open