The U.S. Air Force acquired the Sea King for combat search and rescue missions, redesignated the HH-3 and it received the nickname "Jolly Green Giant" in Vietnam. As you well know the "Jolly Green Giant" was a symbol of the Green Giant food company. The aircraft was given the knickname due to it's size and green finish. Later the larger HH-53 helicopter received the nickname, "Super Jolly Green Giant".
A transport version with a rear loading ramp was designated the CH-3. The CH-3, of which type Clint's challenge is, is also referred to as the Jolly Green Giant
http://www.jollygreen.org/h3loc.htm