"Er, well. Here," He pressed it into Michael's hands gently, "I figured if it was still bruised or tender it might just be the muscles tensing up and trying to recover so I charmed this for you. If you squeeze it..."
Stephen trailed off and reached out to grip the sack in Michael's hand firmly. Instantly it came to life with a soft gentle vibration and began to warm up to a comfortable temperature. "Squeeze it again and the charms will turn off," Stephen added as he stepped back, as if being too close to Michael might set off some sort of alarm. He put his hands into his pockets and looked up to Michael's face for a reaction. Now he was standing here, the whole idea seemed a little silly. Of course Pomfrey would've treated it. What would be the point of a little warm, massage weight?
"Well, ah, yes. You don't have to use it obviously, I just thought it might help," He added weakly.