Constriction
The first scene opens with an overhead shot of Sasha Grey in a straitjacket with the straps pulled brutally tight, kneeling on the hard wood floor in strict ball tie and completed with a secure face harness gag controlling her head and getting her neck back as far as it will go without choking her air off.
Sasha moans, trying to find a way to deal with the tension, but cyd comes in and impossibly finds a way to pull the strap on her head harness even tighter. He whips her. He vibrates her. He leaves her to her ordeal. She screams, she comes, but she is bound so tight she cannot even move her body a half inch, except for her toes.
The shoot goes on, followed by extra footage of another girl.