Blood was running down his arm and over their hands.

It was running down my arms and doing a nice job for the camera.

The blood was still fresh and running down his arm.

Blood had run down his arm onto the white shirt.

He certainly wasn't imagining the blood running down his arm.

He could feel a trickle of blood run down his right arm.

This time he felt some pain, and a wet heat as blood ran down his arm.

Occasionally a little line of water ran down her bare arm.

I took his sweatshirt off and the blood was literally running down my arms.

She looked over and saw blood running down his arm, over her hand.