As a recurring guest star from the show's launch and later a regular cast member, Conway provided unrehearsed bits to sketches that became known to the staff as "Conway's Capers". Conway would play the first taping straight, but (if the sketch had played well in the first taping, and could be used) would ad-lib bizarre scenarios during the second. Some notable clips included Conway as a Nazi interrogator berating an American captive (Lyle Waggoner). Using a Hitler puppet and a pencil as a "club", Conway sang three verses of "I've Been Working on the Railroad" as Waggoner tried in vain to ignore him. Some, like the Hitler puppet, made it into the final broadcast; others, like a notably convoluted story about Siamese elephants joined at the trunk (ad-libbed during a 1977 "Mama's Family" sketch), were edited, the uncensored version only appearing years later on CBS specials. Conway's favorite victim was Harvey Korman, who often broke character reacting to Conway's zaniness, such as when Conway played a dentist misusing Novocain or the recurring role of "The Oldest Man" – an elderly, shuffling, senile man who slowly rolled down stairways and fell prey to various mechanical mishaps (including an electric wheelchair and an automated dry-cleaning rack).