I went to Mt. Auburn Hospital today to have a mold made of my face so that an "immobilization mask" could be made for future radiation appointments. They put a substance on my face that felt like warm Silly Putty (although somehow I could breathe through it) and then put a cold cloth on it so that it would harden. In the scheme of things, this was not a hugely time consuming event in my day, but it was the type of appointment that drives home "what's going on."