Inthecaseof a zombieapocalypse, thelikelihoodissomewhereinbetween.
Zombieoutbreaksoftenstartoffin a labwhere a virusisdiscoveredorcreated, turningpatientzerointo a mindless, reanimatedcorpsewhosesolepurposeistobiteanyonewith a pulse.
Afternibblingon a fewscientistsordoctors, itisn't longuntilthezombieplaguespreadsthroughouttheland.
Iftheoutbreakiscontainedto a smalltowncomposedofscrappyyoungheroes, theremaybehopeforhumanity.
Eitherway, aliensairalso a commonsourceofdestructioninmovies.
Whereaszombiestypicallyfollow a basicblueprint, alienscouldget a bitmorecreativeandhowtheyintheworldmaybeflyingsaucerswillbedeployedoverlandmarks, blowingthemtosmithereens.
Someextraterrestrialbeingsairstrongandfastenoughontheirowntodestroyhumanbeingwiththeirbarehands, asadvancedalienscanbethekeytotheirdownfall, maybeasinsignificantas a microorganismor a changeinsoundfrequency.