* AwesomeDearBoy: Aaron Eckhart lists this as his favourite role and says he would love to do a sequel.
* BackedByThePentagon
* CaliforniaDoubling: Ironically set in California but filmed in Louisiana.
* DoingItForTheArt: Aaron Eckhart was so enthusiastic about this movie that he continued filming after breaking his arm. He even took the time to record audio for the video game adaptation.
* DuelingMovies: With ''Film/{{Skyline}}''. There was a lawsuit over it and everything, primarily due to the same [[Creator/{{Hydraulx}} special effects guys]] doing work on ''Skyline'' while this movie was in post-production.
* FanNickname: The aliens are never really named -- there are lots of nicknames. Some call the aliens "[[FunWithAcronyms BLAAs]]" for "Battle Los Angeles Aliens".
* LifeImitatesArt: Interestingly, the [[http://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami 2011 Tohoku earthquake and tsunami]] happened the day this was released in theaters, so as the movie about things coming out of the water and attacking Los Angeles was released, Los Angeles (and the rest of the Pacific Ocean) was under threat of a tsunami coming out of the water and "attacking".
* TheMockbuster: The Asylum with "''Battle OF Los Angeles''".
* WhatCouldHaveBeen: Santos wasn't in the original script. She was added in about a month before filming began.
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