J.D.: [v.o.] I couldn't decide whether I should tell Murray his dad wasn't his dad. Luckily hospitals are full of supportive colleagues eager to help.
Dr. Kelso: Go tell that little bastard this second, before he coughs a kidney up to his fake father and sues this hospital. Write that down in your little unicorn book.
J.D.: Uh, actually, sir, it's a horse with a sword on his head.
[fantasy, J.D.'s diary starts talking to him:]
Unicorn: [J.D.'s voice but high-pitched] You know I'm a unicorn. Why can't you just say it?
[reality:]
Dr. Kelso: What are you going to do, son?
J.D.: [high-pitched voice] Well, Dr. Kels- [clears throat] Well, Dr. Kelso, I'm just gonna tell him.