Loremaster said
Really? To me it seemed straightforward as he attempted to act similarly to the other two, but I will try to keep it in mind for future reference.
Well you might try to act normal without letting your tells show that you have trouble moving your body. But that might require a roll of some sort and my character did manage a perception to specifically tell if something was wrong. You will probably pass for an old man or something if no one is looking straight at you and is paying attention.