Also referred to as 'newting'. It is where you do a headstand where ever you are, or in any place you can think of. Named after Isaac Newton, for when you are 'newting' you are defying gravity with your feet in the air. Look at is upside-down and you'll be holding onto the earth for dear life as to not fall into the sky.
"Dude, I was doing the Newton the other day in the park. It was so fun man, it became my new profile pic"