What did dr smartz say to the guy who had been attacked by a vicious eight foot tall cockroach?

"Yes, it seems that there is a nasty bug going around."

Explanation:

Doctor Smartz does not seem frightened or curious when he hears that someone was attacked by an eight-foot cockroach. He simply continues his work calmly and says to the victim of the giant cockroach: "Yes, it seems that there is a nasty bug going around."

Dr. Smartz said to the guy who had been attacked by a vicious eight foot tall cockroach that "Yes, it seems that there is a nasty bug going around."

Nasty, in some sense that it is quite huge and much taller than a normal person.