Gymnasts Practice Insane Seesaw Routine That Will Have Your Jaw Dropping [VIDEO]

These gymnasts are having their ups and downs.

In this video, David Rimmer is training with a partner on a teeterboard, which is just a fancy way of saying 'big seesaw.'

There really aren't too many words to describe how cool this actually is, so we'll just stop blabbering and let you enjoy.