Unintentionally Funniest Part?

Mine:

Nell: "You have to hide. That's why the house is the way it is. He used to play hide and seek with the children!"

Liam Neeson: "Hide and seek?!?!? What does he think this is?? A game!??!"

The very notion of a ghost's desiring to play hide and seek is laughable, but Liam's serious delivery sealed it.