Ghostbusters:
"Then, during the Third Reconciliation of the Last of the Meketrex Supplicants, they chose a new form for him, that of a giant Sloar! Many Shubs and Zulls knew what it was to be roasted in the depths of a Sloar that day, I can tell you!" -Vinz Clortho (Rick Moranis)

Aha! I thought Vincent Clortho sounded familiar. It's from one of my all time favorite movies - Ghostbusters. Louis, played by Rick Moranis, was possessed by the Keymaster Vinz Clortho. Here's a bit of the script from IMDB.

Louis: [Louis, as the possessed Keymaster Vinz Clortho, runs out of Central Park, scaring a married couple] I am the Keymaster! The Destructor is coming. Gozer the Traveler, the Destroyer.
[Louis pants and sniffs, then notices a horse carriage; horse neighs]
Louis: Gatekeeper.
[Walk over towards the horse]
Louis: I am Vinz, Vinz Clortho, Keymaster of Gozer. Volguus Zildrohar, Lord of the Sebouillia. Are you the Gatekeeper?
Coachman: Hey, he pulls the wagon, I made the deals. You want a ride?
[the possessed Louis growls at the coachman with his red-glowing eyes]
Louis: [to the horse] Wait for the sign. Then our prisoners will be released.
[Runs amok, scaring bystanders; yelling]
Louis: You will perish in flame, you and all your kind! Gatekeeper!
Coachman: What an asshole.

CLORTHOS! Can't stop laughing.