You really have to memorize when you have a checklist the nurse could read off so you don't miss a step? I wouldn't trust my memory to hold a single step of that checklist, I'd refer to it every time.
In "the checklist manifesto" the author suggests one of the main benefits of checklists for medical procedures is that nurses or other lower ranked people in the room who know the doctor is about to kill someone or cut off the wrong leg by mistake can communicate this information without the Doctor ruining their career for making them look stupid.
