Smallville, Season 2

Lex:
I never figured you for having an identity crisis, Clark.

Clark:
It's for a friend.

Lex:
Haven't heard that one before. What's your friend's problem? Napoleon or Messiah complex?

Clark:
Actually he thinks he's an alien.

Lex:
So that proves he isn't... come on, Clark, if you were really an alien would you go around telling people about it?

Clark:
Probably not.

Lex:
Let me guess. Your friend, he's a little odd. Spends a lot of time alone, thinks no one understands him. I just described myself in high school. It's a classic outsider profile. I'd say he's just trying to get attention. You believe there are aliens among us, Clark?