"[calmly] Ah, well, I attended Juilliard, I am a graduate of the Harvard Business School, I travel quite extensively, I lived through the Black Plague and I had a pretty good time during that, [getting aggressively more demented] I've seen The Exorcist about 167 TIMES, AND IT KEEPS GETTIN' FUNNIER EVERY SINGLE TIME I SEE IT! NOT TO MENTION THE FACT THAT YOU'RE TALKIN' TO A DEAD GUY! NOW WHAT DO YOU THINK?! [calmly] You think I'm qualified?"
January 1, 1970
https://en.wikiquote.org/wiki/Beetlejuice