here's johnny!
For anything that references the famous scene from The Shining in which Jack Torrance axes through a door and says the phrase "Heeeere's Johnny!" while making a rape face.
The line and method of delivery are not original to The Shining; Jack just gives a disturbing tone to the way Ed McMahon introduced Johnny Carson during the latter's 1962 to 1992 stint in The Tonight Show, an American variety TV show franchise airing since 1954.