Beetlejuice: Alright, let's get down to business! I got a card around here somewhere. Here, here, who do I have to kill? Here, hold that for me, would you?
Barbara Maitland: Whoa! Ah!
Beetlejuice: There you go!
Adam Maitland: You don't have to kill anybody!
Beetlejuice: Ah! Possession! Good! [Beetlejuice's voice comes out of Barbra's mouth] Learn to throw your voice. Fool your friends! Fun at parties!
Adam Maitland: What are your qualifications?
Beetlejuice: Ah, well, I attended Juliard, I graduated from Harvard Business School, I travel quite extensively, I lived through the Black Plague and I had a pretty good time during that, I've seen The Exorcist about 167 times and it keeps getting funnier every single time I see it, not to mention the fact that you're talking to a dead guy! NOW WHAT DO YOU THINK?
Chosen answer: Because he can't say his own name, therefore the charades is the only way he can get her to figure out what his name is to say it.
Guy