I read it somewhere else:
anesthesiologist: count down from 100 please.
patient: 100, 99, 98, 97, 96......
hours later, in the recovery room
The patient woke up, yelling "95!"
Every time I woke up from surgery I found a nurse at my bedside. Apparently it is impossible for a nurse to wait by your bedside until you wake up. So does the nurse actually wake you up when they thinks you are ready? I can only remember waking up, but no idea if I was waken up by anyone.