"The Diving Fool" (November 13, 1951)

Amazing comedy diving act from Larry Griswold on the Frank Sinatra Show:

Griswold (September 17, 1905- August 24, 1996) was a co-inventor of the trampoline with George Nissen.  Wikipedia:

known as "The Diving Fool", was an American gymnast & entertainer who was involved in the early development of the trampoline.

Griswold was a college level gymnast and tumbler while studying physical education at the University of Iowa. While coaching at an acrobatic school in New York, he enjoyed performing in vaudeville shows. However, he decided to return to Iowa to become a teacher and in 1931, he became a gymnastics coach at the University of Iowa where he met George Nissen who was also a skilled gymnast & tumbler.

Read more on Wikipedia.

Here's the 2010 ISHOF induction: