I saw this [video][1] on levitating a denser liquid on less dense air by vertical shaking. 

But I couldn't understand some points in the video. 

**1** : Why didn't the air below the liquid mix up with the liquid since it is under extreme pressure due to the weight of the liquid ? If it shakes regularly wouldn't the liquid Ever fall ?

**2** : Also how did the liquid levitate at [0:37 ][1] ? Since the air was in the upper region of the tank , so **why** and **how** did that layer of air came at the bottom of the tank and caused the liquid to levitate ? 

**3** : can this shaking cause boiling of the liquid ?

If I am interpreting something wrong kindly inform me.

  [1]: https://youtu.be/bodsuTucSxQ