This is almost like one of the cut traps from Saw 2, but with some changes and major additions. I even put this into a story form for you all:

The victim is a prostitute, she's strapped to a chair situated on top of scaffolding. She's in her usual slutty working outfit. Her tits are tied down tightly with metal wire connected to a motor, and there is a waffle iron open infront of her. Below her is a long spring loaded metal rod, connected to a timer.

The woman awakens to what feels like a hangove to her. Shr remembers serving a client, stepping out of the car and then that's the last thing she remembers. She tries to rub her eyes, but finds that her wrists are secured in leather straps. "I don't know this place!" she thinks, looking around the empty dark industrial space she's in. "HELP! WHERE AM I? LET ME OUT OF HERE!" She screams and thrashes around, which pains her chest greatly. She looks down, and sees a faint relfection of light from the loops metal wire that have been tightened around her boobs. The realization sets in. It's that serial killer that puts people in sick games. She notices a tape recorder, just in her restricted arm's reach. She manages to press play, and listens as the tape crackles to life. "Hello Sara. Over the years you've been selling your body on the streets for cheap, not appreciating the other gifts you have. You're relying on the simple instincts of lonely people, and prey on their money, using your form to lure them in for cheap "love". Tonight you'll show me if you can let go of your ways and looks to become a more productive member of society. Before you is a tool that will allow a motor to cut your straps, but also sever and ruin your "tools of the trade". All you need to do, is to press your face on it. If you choose not to, you will be penetrated, albeit much more violently than ever before. You have 30 seconds to choose, but do hurry. Let the games begin." The tape goes mute with static, and an audible ticking sound begins, along with the humming of an electric motor. Sara looks around her, expecting someone to be there to help her out of this, but alas, no one is here for her. She has to make a choice now.

1. Live: Sara, tears in her eyes, grits her teeth and quickly but somewhat gently jams her face to the waffle iron, left side first. The iron nudges forward, creating a clicking sound. The motor below gets connected to the pulley system bound around her straps and boobs. Almost in the blink of an eye, and blinding pain, the wires tighten rapidly. The leather straps snap off the chair, and 2 fleshy thuds sound as Sara's amputated breasts hit the dusty concrete floor below. Sara screams in agony, but the ticking has stopped and she's free to go now.

2. Die: Sara sobbingly inches her face closer to the iron, but hesitates again. She collapses into a fit of crying, and screams up at the ceilling. At the same time, unbeknownst to Sara, the timer has hit 30 seconds now. In a flash, the signal is sent to the spring mechanism down below, which lets go with a loud, almost gunshot like snap. The steel rod, shoots up, first striking through the plywood panel, then the wooden chair and finally up through her asshole. Within a second, the steel rod has impaled Sara completely from ass to mouth. Sara's final moments are spent as she watches the end of the blood coated rod. Her eyes are wide and welling with tears. The rod is partially in her throat, broke her jaw and knocked her front teeth out, so there are nothing more than a few gurgled moans coming out of her. She goes limp, and her dark blue eyes roll back. Another victim for the list.