[Harry is dressed as an alien for Halloween]
Mrs. Dubcek: Oh, Harry, you're an alien.
Harry: NO, I'M NOT! [realizing his costume] I mean, yes, I am.
Mrs. Dubcek: Oh, Harry, you're an alien.
Harry: NO, I'M NOT! [realizing his costume] I mean, yes, I am.
[Harry is dressed as an alien for Halloween]
Mrs. Dubcek: Oh, Harry, you're an alien.
Harry: NO, I'M NOT! [realizing his costume ] I mean, yes, I am.
http://www.tv-quotes.com/shows/3rd-rock-from-the-sun/quote_19295.html