Recognizing the feeling of the chair she realizes they are in the upstairs spare guest bedroom.
This can lead to asphyxiation.
Being able to communicate explicitly and coherently before, during, and after a session is what keeps it as safe and enjoyable as possible.
If you like extremes, feel free to add small square of sanding paper on the padding.
In this position, the bottom's ankles are tied to a pole—make sure to use something that won't give anyone splinters—a PVC pipe could work here or even a long Swiffer handle.
For those who can feel a little claustrophobic in latex or leather masks, this neoprene is a great option.