Shining a light on the subject

It went something like this...

Me:  Radio station studio.
He:  Oh.  I have the wrong number.
Me:  What?  You don't want to talk to me?
He:  Okay.  I'll talk to you.  What do you wanna talk about?
Me:  Ask me anything.  I'll tell you the answer.  The answer is "I don't know".
He:  Okay, answer this... we were discussing it during safety class today.  Back in the late 1980's early 1990's, they passed a law saying all cars had to have daytime running lights.  But today, you don't see any cars with headlights on during the day.  What happened to that law?  Did they repeal it?
Me:  Yes.  Because a group of vampires didn't like it and they lobbied to have it changed.
He:  Boy, you almost had me thinking you really knew the answer.
Me:  It was the vampires that gave me away, isn't it?
He:  Yeah.
Me:  Would you believe... werewolves?
He:  You should get back to work.
Me:  I should.  Better luck with your next call.