Wil Wheaton: Oh, was that a doorbell?
Amy: I didn't hear anything.
Wil Wheaton: [doorbell rings] Huh, there it is again. Sheldon, why don't you answer it?
Sheldon: But I don't know who it is.
Wil Wheaton: Maybe it's a special guest who I invited just to surprise you. Why don't you open it up and find out.
Sheldon: This is a terrible message to send to children. Children, you never open the door if you don't know who's on the other side. You always make your mommy or daddy do it while you hide under the bed and try to imagine what your superhero name will be when you avenge their deaths.
Amy: I'll get it.
Sheldon: But it can't be the Silver Shadow. That's mine.