History Film / Xtro

* LeftHanging: There doesn't seem to be a real reason for Analise to turn into an egg-laying cocoon other than shock value and whatever Sam had in mind was never elaborated on.

* OhCrap: Joe has one when he notices that [[spoiler:the woman in the picture Sam had in his jacket pocket looks exactly like the murdered woman in the newspaper]]. Also the driver when he notices that the "animal" he hit with his car has a hideous humanoid face attached to it.

* OhCrap: Joe has one when he notices that [[spoiler:the woman in the picture Sam had in his jacket pocket looks exactly like the murdered woman in the newspaper]].

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* FaceFullOfAlienWingWong: Alas poor "Woman in Cottage". [[spoiler:And Rachel too, in the revised ending]].

* ExpressDelivery: Happens to the woman in cottage, after the first alien impregnates her. Her belly grows so giant that it opens her dress, showing its full size.

* DeathBySex: [[spoiler: Neither Joe nor Analise last long after their romp. Rachel also dies shortly after her encounter with Sam in one ending.]]

* MakeMeWannaShout: [[spoiler:Near the end of the film, the half-changed Sam uses his horrifying alien scream aimed at Joe, whose ears erupt in a bloody gush before he collapses dead]].

* AssholeVictim: [[spoiler:Mrs. Goodman is a downplayed example; she's shown to be a nice woman in most scenes. Her biggest crime was horribly killing Tony's pet snake Henry, but it was out of panic]].

* MakeMeWannaShout: [[spoiler:Near the end of the film, half-changed Sam uses his horrifying alien scream aimed at Joe, whose ears erupt in a bloody gush before he collapses dead]].

* WhyDidItHaveToBeSnakes: Mrs. Goodman freaks out and kills

** Arguably, the unseen aliens that originally kidnapped Sam could qualify as well. They separated Sam from his family and caused his son severe trauma that gave him nightmares for ''three years'', took him to their world and genetically altered him in order to be able to live there, and then allowed him to return to Earth so he can bring back his son with him. After all the things Sam does in the movie as soon as he lands on Earth, it's safe to say these aliens, the major culprits behind his new personality, have very warped sets of morals, if ''any''.
* BodyHorror: Where to begin? Sam's first alien form, a quadruped, deformed creature that seemingly moves backwards. The cottage lady which alien-Sam impregnates, and as result she later gives birth to fully grown Sam and dies. Analise once Tony infects her with alien DNA and turns her into a living egg-dispensing cocoon. [[spoiler:Sam as he slowly rots and falls apart after having sex with Rachel, and becomes a skeletal alien with a beating heart visible in his chest and pincers for hands]].

* DisappearsIntoLight: [[spoiler:Not caused by death, but Sam and Tony, changed into aliens, are taken back to the alien world by the same triangular shaped light which kidnapped Sam three years ago, and later brought him back]].

* GirlsWithGuns: The cottage lady gets armed with a shotgun after she senses unwelcome presence around her cottage. [[spoiler:Unfortunately that doesn't help her from being assaulted by the alien]].

* JumpScare: The first alien creature suddenly reaches his arm from beneath a table and trips the cottage lady.

* TooDumbToLive: The driver in the forest, after accidentally bumping into Alien-Sam with his car, decides the best thing to do is to stop the car, go out and see what was that creature he just hit. Alien-Sam kills him for it, and the driver's girlfriend suffers the same fate shortly afterward.

* DeathBySex: [[spoiler:Not so much "death", but Sam's human form only starts to gruesomely rot and fall apart whilst in the process of having sex with his estranged wife]].

* TheUnSmile: After the cottage lady falls down due to her growing belly's weight, at one point she looks like she's smiling. Although it's possible that the pregnancy process transformed her mind to become "maternal", thus causing her to smile upon seeing her "offspring" moving inside her belly.

* KillEmAll: [[spoiler:Most of the cast are dead by the end of the movie (though Rachel survives in the original ending)]].

* TheUnSmile: After the cottage lady falls down due to her growing belly's weight, at one point she looks like she's smiling. Although, by theory, it's possible that the alien pregnancy process transformed her mind to become "maternal".

* AmbiguousSituation: Was it actually Sam that returned, having been transformed into an alien by aliens, or was the returned Sam an alien doppleganger or clone hybrid with his memories, and the original Sam is dead or still in space.

* SweetTooth: Mrs. Goodman seems to have fondness for sweets. It proves to be her undoing when she reaches out of her hiding spot to grab a piece of chocolate that fell on the floor, drawing the toy soldier's attention.

* GirlsWithGuns: The cottage lady gets armed with a shotgun after she senses unwelcome presence around her cottage. [[spoiler:Unfortunately it doesn't stop her from being assaulted by the alien]].

* JumpScare: The first alien creature suddenly reaches his arm from beneath a table and trips the cottage lady. Since she locked all of the doors in the house previously, it's a mystery how he got inside.

* TheUnSmile: After the lady in cottage falls down due to her growing belly's weight, at one point she looks like she's smiling. Although, by theory, it's possible that the alien pregnancy process transformed her mind to become "maternal".

* TakeThat: Xtro's whole purpose is to give the middle finger to [[Film/ETtheExtraTerrestrial ET]] as well as ''Film/CloseEncountersOfTheThirdKind'' - not only is ''Xtro'''s ending a parody of how the aforementioned two films concluded, but the first thing Sam does after he is reborn is... phone home!

* ExpressDelivery: Happens to the woman in the cottage, after the first alien impregnates her. Her belly grows so giant that it opens her dress, showing its full size.

* BalloonBelly: The poor woman in the cottage, after she wakes up [[spoiler:from the first alien's encounter]], suddenly begins to feel pain in her belly, which then outgrows to a gigantic size that it opens her robe, showing it in full size.

* ExpressDelivery: Happens to the woman in the cottage, after the first alien impregnates her.