When you go to surgery the last thing you want to happen is to wake up during the case and experience the pain and recall of the procedure. Fortunately, this is now an uncommon occurrence. In the young days of anesthesia, the level of anesthetic was difficult to control and it was not uncommon to have this occurrence. As methods improved the anesthetics became much more reliable and a patient’s level of consciousness was easier to control. In addition, there are now tools commonly used to monitor the effectiveness of anesthesia.