Lady Talina's Vakuumbed Facesitting

Lady Talina has a new idea, how to play with her slave's oxygen supply. She put him in a rubbermade vakuumbed, it seals him completely from the air, there is only one little hole for breath. Then she evacuate the hole bag with the slave inside, you can see how the rubber presses on his body..... but not enough, she can cut off his last airsupply, the little hole, with sitting on it.