Why did you run away?

A man ran out of the operation room. The nurse caught up with him and asked, "Why did you run away??" He replied, "The nurse said - 'What are you afraid of? It's only an appendix operation'..." "Thats ok, but why did you run away??" asked the nurse again. "She said it to the doctor, not to me....." protested the man indingnantly...