"Cut deeper, pull harder."

Heard by a woman having her eye surgically removed.

Although normally a patient does not remember anything about surgery that involves general anesthesia, about one or two people in every 1,000 may wake up during general anesthesia, according to the Mayo Clinic. Most of these cases involve the person being aware of the surrounding environment, but some experience severe pain and go on to have psychological problems.

If not remembering is part of the process, do we really know how many people experience awareness during surgery? If you've ever had general anesthesia, are you sure this didn't happen to you? If you somehow, now, could find out that it had happened, but you still could not remember it, it wouldn't bother you as much as it should, would it?