Answer
Extremely nervous man was the character Don Knotts played in the "Man in the Street" interviews. Knotts' portrayal of this character was characterized by his exaggerated nervousness, stammering, and comical facial expressions. He would often become flustered and confused when asked questions, and his responses were often nonsensical and rambling. Knotts' portrayal of the extremely nervous man became one of his most iconic and memorable characters.