AVS Underwater bondage and extreme breathplay

Ella goes underwater and breathes through a hose, but at the top, this hose sometimes gets blocked and she is unable to take a breath.
At

Ella descends to the bottom of the pool and begins an unusual underwater endurance experiment.

After holding her breath for a long time,

Ella begins with a long breath hold before moving into a difficult breathing endurance challenge.

Using only the air inside a balloon, she