We recently acquired a hospital ventilator from a friend. This is a machine that is used to assist people in breathing. In this video Elise Graves and Dart Tech (Fetlife) test the ventilator using a modified aircraft pilot oxygen mask which fits securely to the face. Dart Tech is the subject in this test, and wanted to be secured in the bondage chair to make the test more exciting. Naturally Elise went along with his request and strapped him in.