LOL Groundskeeper Willie. Tangent: have you seen the Treehouse of Horror episode where Willie is Freddy Krueger and he manifests as a giant spider monster and other things? That was actually my first exposure to Freddy Krueger.

Anyway: I have no clue. It says that he can't stay in the house at night. Babysitter confirms this. And it doesn't explicitly say that he sends her either: "Then their father couldn't find Mr. Coeslak, but the babysitter showed up precisely at seven o'clock." So did the babysitter lock him in the tool room? Does he become a ghost at night and automatically get locked up at night, and that's why he can't come in the house? WHO KNOWS.