The Magician raised his hand. Marisol and Laurel lowered the saw blade until it touched Rebecca between her legs. She felt the steel, and stopped wiggling. The Magician lowerd his hand, and the two assistants pulled the saw, ripping into the the white thong she was wearing. The cloth tore and spread, long enough to catch a glimpse of Rebecca's dark pubic hair before the second pull of the saw started cutting into her body and covering it with blood.
Rebecca threw her head back, thrashing as the girls kept sawing, her body rocking with each stroke of the blade. The saw had soon cut completely through her panties, and mostly through her skirt.
"You'll notice the progress has slowed," the Magician pointed out. "My assistants have reached her pelvic bone. Don't worry, the saw is sharp enough to handle it without too much trouble."
A few more strokes, accompanied by muffled cries from the victim, and the saw plunged through again quickly, its full depth inside her body. It soon reached the beltline of her skirt, roughly cutting the fabric. The two halves of the ruined garment fell off her body to the floor. The assistants kept sawing swiftly, and the blade sliced into Rebecca's body clear to her bellybutton. They paused. The magician looked at his volunteer. "Rebecca, how are you doing?" Rebecca whimpered through her gag. Blood dripped down her body into her hair.
"Historically, many of the executions would stop at this point, to allow for a slower death. In the service of spectacle, and the traditions of the Grand Guignol, however, I think we can go to greater lengths, as it were."
Rebecca cried out as the assistants started sawing again. The saw continued quickly, slicing her abdomen in two. The descent became difficult again as the saw neared her ribcage. "Keep going, Mari, Laurel- we wouldn't want to deprive the audience." They pulled the saw faster. It began to crack through ribs. Rebecca's eyes rolled back in her head. The parts of her above the blade were spreading a bit, and blood was everywhere. Her blouse was cut as the saw reached her clavicle, and the bloody pieces flopped down and hung against the cuffs securing her wrists. "Almost done, girls- just a little more!"
Marisol and Laurel started going even faster, and the saw began to cut through Rebecca's chin, her body swaying wildly with the saw at every pull. Soon the ball gag, sliced in half, fell from her mouth. Shortly after, the teeth cut her forehead between her eyes. A few last strokes, and the saw fell dropped down, having passed through the top of her skull. The assistants quickly pulled it out from below and walked off the stage.
The two halves of Rebecca hung limply on the frame, separated by a gap of at least a foot and a half. Her face was hardly recognizable anymore. The Magician waved his hand from the top to the bottom of the gap, proving she had been sliced in twain. He smiled and stepped forwards. "And- wait for it..."
He snapped his fingers. At once, Rebecca's intestines spilled out of the two halves of her body and across the floor. Her other internal organs followed with a wet plop, and her lungs hung from the sides. Finally, slowly, the grey matter in the wreckage of what once was her head slid out, exposing the inside of her skull to a quiet, stunned audience, not at all sure what they had just witnessed.
"Ladies and gentlemen, please, a big hand for my lovely volunteer, Rebecca!" The Magician bowed. "Ladies and gentlemen, good night!" And the curtains swung closed.