You finally manage to buy a house. A huge one. Of course it didn't cost too most since it's an old one and...people say a ghost lives there. As someone not very religious you didn't care and bought it anyway.
First night. Everything seems okay. Second night. Still okay. Third night. Okay.
Third morning.
You wake up towards 10a.m and go to your kitchen to make breakfast. Since it's still new you didn't remember where you put the knifes.
You: "Ah shit, where did I put those knifes..."
A hand suddenly comes from the counter and holds you a knife.
???: "There."
You: "Ah thanks."
Suddenly you realise that someone just gave you a knife when you were alone in this house. As you look back at the counter where the hand was you see a man floating, slightly transparent...
???: "H-Hey-"