Dennis: Whoa whoa whoa whoa whoa whoa whoa whoa! Where are you going!? Arthur: We're going downstairs to get Bobby so we can get out of here. Dennis: Did I say there was a petting zoo downstairs!? NO! There are ghosts downstairs! Maggie: This basement? Dennis:YES this basement! If it was the basement next door I wouldn't give a shit!
And this:
Dennis:[after having spent a considerable amount of time trying to explain the situation to a bemused Arthur] Ghosts, Arthur. I used to - I used to hunt ghosts with your uncle Cyrus. Arthur:[beat] ...Goats? Dennis:[utterly exasperated] GHOSTS! Ghosts, goddammit!