Don't be Nervous

You could hear this from outside a closed door in a hospital:

"...Its ok... don't worry, its really a minor operation, NOTHING can possibly go wrong... you will be in and out in a few minutes, don't be nervous, why are you worried..."

A man, clearly the patient comes rushing out, slams the door and locks it and starts to run away... When asked why he was running away when there was no need to worry, he looked furtively about and said:

What you heard... that was the nurse talking to the doctor!!!!!!