Witch Hunt Post Credit scene

BWI Agent Hawthorne: Your Honor, we have a problem.
Judge Dunsen: It can't be! All the witches made it to the Asylum through a wall with a cross on it?!
BWI Agent Hawthorne: We are aware of that, but it's worse. In the process of attempting to get through that passageway, we found weird ancient drawings and a book with a strange successful miracle ritual buried deep in those spells and dating back over 80 years.
Judge Dunsen: What does that ritual have to do with those witches?
BWI Agent Hawthorne: It gave us coordinates to Metaline Falls, your honor.
Judge Dunsen: Coordinates, for what?
[Scene Cuts to a strange factory]
BWI Agent Hawthorne: A dark secret recipe. It's in an ice cream factory, your honor. His birthmother must have worked very hard to keep this hidden.
Judge Dunsen: Oh, Shit. Rod Sullivan!!!
[His singing is heard from a distance]