The hammer :

The hammer is a small dark room with a stone table. The room naturally attracts masochists, who can't help but put their breasts on the table.
Once the breasts are on the table, a nail appears on the left nipple, in order to keep the left breast stretched and well placed on the stone. Then a hammer appears and comes to butcher the breast with aleatoir power and rhythm.
The hammer only changes side when the breast is totally destroyed and ripped from the victim's chest, as long as it does not fall, it continues to strike.
Being amputated in this way is quite long, unless the hammer happens to strike fast and hard many times.
The hammer will then destroy the other breast while the first one regenerates.
the loop is infinite, unless the second breast is destroyed before the first is regenerated. Even if the rate of striking is random, this almost never happens.