Mistress Amanda is playing with her slave, her game is about holding back air and enjoying the touch of her warm butt while slowly suffocating from the loss of air. She loves this game, especially when the slave is trying his best to please her, but of course he can't hold his breath back forever, so he starts moving and kicking with his feet and that's the point where Amanda stands up for a short period and then puts her round, firm buttocks back on his face.