This shows you that straight up questions about secret identities don't work
Couldn't find the actual clip I wanted, but the dialogue:
Ted: Are you a vampire?
Carl: I’m cutting you off. Go home and get some sleep, Ted.
Ted: Yep, the sun’s comin’ up soon. Wouldn’t wanna be around for that, now would we? How easy do you think it is to sneak into the zoo? I need to see some penguins like, right now!
Carl: Okay give me your arm.
Ted: It tickles