"Oh no you don't. Sit down and let me take a look."

John moves to sit on a patch of ground and unzips his tactical vest, rolling his shoulder again and flexing his hand a little before he begins digging things out of the pockets.

"No complaints, more sitting. You're bleeding."

Bleeding could just be a shallow cut, but it could also be that through the shock Ianto hasn't realised how bad the blow is.