Fear trickled down her spine, but she ignored it.

"You can't make me," said Christian, but cold fear trickled down his spine.

She could feel the cold sweat trickling down her spine.

With sweat trickling down my spine from the heat, I was cold.

The sound came again, trickling down her spine like a rivulet of ice water.

Beads of sweat had formed there and trickled down her spine.

Something cold trickled down his spine and he realized it was a tear.

I could feel the sweat that was beginning to trickle down his spine.

Security officers, she told herself, feeling ice water trickle down her spine.

He wondered if she could see the sweat trickling down his spine.