Surgeon and his Dad

An older gentleman was on the operating table awaiting surgery and he insisted that his son, a renowned surgeon, perform the operation.

As he was about to get the anaesthesia, he asked to speak to his son.
Dad: Son I have to say something to you.
Son: "Yes, Dad, what is it?"
Dad: "Don't be nervous, son. Do your best and just remember, if it doesn't go well, if something happens to me, your mother is going to come and live with you and your wife...."