"Here you are, Mr. Weasley," he passed the cup to Percy.
"What is very important is that you sit as still as you can while I am working on the curse-breaking. It will take at least a couple of hours to untangle--if you need to make any extensive movements, please let me know and I'll notify you when it would be safe to move," Theodore said in a way that indicated that it was something he was extremely used to listing off to all sorts of folks.
"And hold onto this amulet clasped between both hands," he added handing him a smooth black stone with a spiral carving on it. "It'll start to feel warm once the process starts."