Director - Stanley Kubrick

Wendy Torrance (Shelley Duval) and her son Danny (Danny Lloyd) hide from the deranged novelist Jack Torrance (Jack Nicholson) in a hotel bathroom. As Jack begins chopping through the door with a fire axe and sticks his face into the splintered opening, he utters a phrase previously made popular by Ed McMahon on The Tonight Show starring Johnny Carson - "Here's Johnny!"
The line was not part of Kubrick's original screenplay and was improvised by Nicholson.