Impossible?

For a second, Jake thought his body had been cleaved in half at the waist, but the vision of horror he was envisioning did not come true. When he lifted his head to examine his body, he was pleased to find that his body was still in one piece.

"Phew..."

Nevertheless, his spine had indeed snapped on impact and his entire abdominal girdle had been ripped open by a broad blade with seemingly blunt edges. He had no trouble identifying the guilty weapon. Although invisible, his clone was wielding one that met the criteria.

Despite his delight at getting away with so little damage, Jake was nonetheless puzzled. He knew what his body was capable of and when his clone had hacked him down, he should have ended up as a bloody pulp on the rocky ground.