"How about sleeping on stone so I could barely stand straight when I got my body back? Man I thought you'd thrown out my back." Jim shakes his head.

"So, this is probably gonna hurt." Jim never said he was going to be careful. If it's a questing of the needle or Naugus's hide giving in first, well, then they might need something else.

He could just go get Bones' tricorder. but where's the fun in that?