He had an ugly headache and his spine felt as if it had turned to glass.
His spine felt as though it were going to snap with a crack loud enough to alert the women.
When I straightened up again my spine felt as if ft had cracked in at least three places.
She held it out to him, felt a shiver of delight race up her spine as his hand brushed hers.
"Without the proper support, your spine feels the same way."
His ribs ached and his spine felt as though it was on fire.
His spine felt as if it would snap at any second.
My back tormented me; my spine felt as if it had been filled with ground glass.
His spine felt like a crystal snake dropped on flagstones!
His spine felt like it was being stretched in some medieval torture device.