Continuity mistake: Any shot of the alien which isn't made using a guy in a suit has a green glow around the alien's body but any guy-in-a-suit shots do NOT have a green glow.

Alien 3 (1992)
Ending / spoiler
Directed by: David Fincher
Starring: Sigourney Weaver, Charles Dance, Charles S. Dutton, Paul McGann
Ripley and Dillon trap the alien in the furnace room.Dillon sacrifices his life to prevent it from escaping and hot lead is poured over the alien.It then runs after Ripley who then turns on the water which kills the alien.The man who created Bishop tries to prevent Ripley from killing herself and the alien queen.Ripley however makes the ultimate sacrifice by jumping into the furnace.In the theatrical version the queen bursts out of her chest but is held back just before they burn.
Matt Barnes
Andrews: This is Rumor Control. Here are the facts.
Trivia: Originally, the movie was going to be shot by cinematographer Jordan Cronenweth, but Cronenweth suffered Parkinson's Disease midway through filming and was let go by the line producer, being replaced by Alex Thomson. However, impressed by Cronenweth's work, David Fincher later worked with Cronenweth's son Jeff in nearly all of his future movies, resulting in two Academy Award nominations.
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Answer: She means that the alien it moves on 4 legs, whereas the other aliens moved primarily on two legs. This alien came out of a dog in the theatrical version and from an ox in the Assembly cut version, which can only move on 4 legs. This hints to the fact that the alien inherits the characteristics of its host.
XIII