In this video, Sierra has been tied up and given an oxygen mask to breath through. Her friend assisting her occasionally puts his gloved hand on the mask to ensure it's pressed against her face tightly enough. He also examines the air hose and her restraints occasionally.

In this video, Sierra has been tied up and given an oxygen mask to breath through. Her friend assisting her occasionally puts his gloved hand on the mask to ensure it's pressed against her face tightly enough. He also examines the air hose and her restraints occasionally.