A recent visitor to the SeriousBondage Institute brought along an unusual breathing device which we had not seen before. After a bit of research we discovered that it is called a 'Squeeze to Breathe' device. The idea is that someone in a gas mask can only breathe if a rubber pump bag is continually being squeezed again and again. If the pump bag is not squeezed at regular intervals the gas-masked person does not have a regular supply of air. The gas-masked person could squeeze the bag themselves between their own knees, or step on the bag if it were on the floor, or have someone else do the sq... Show more