<P> Here's Johnny may refer to: </P> <Ul> <Li> "Here's Johnny", the catchphrase used by Ed McMahon for almost 30 years on The Tonight Show Starring Johnny Carson (1962--1992) <Ul> <Li> "Here's Johnny", catchphrase that was reused by Jack Nicholson in the 1980 film The Shining </Li> <Li> "Here's Johnny", a song referencing the McMahon catchphrase by "Weird Al" Yankovic on his 1986 Polka Party! album </Li> </Ul> </Li> <Li> "Here's Johnny", a 1995 song by Dutch pop group Hocus Pocus </Li> <Li> Here's Johnny, a 2000 documentary film about John Hicklenton </Li> </Ul> <Li> "Here's Johnny", the catchphrase used by Ed McMahon for almost 30 years on The Tonight Show Starring Johnny Carson (1962--1992) <Ul> <Li> "Here's Johnny", catchphrase that was reused by Jack Nicholson in the 1980 film The Shining </Li> <Li> "Here's Johnny", a song referencing the McMahon catchphrase by "Weird Al" Yankovic on his 1986 Polka Party! album </Li> </Ul> </Li>

Where does the saying here's johnny come from