This movie was freaking awesome, and one of the best alien invasion films to come out in the past 5-7 years. The special effects are amazing for what I thought would be a low-budget survival-horror teenage disaster, and the aliens look great (besides some being hybrid-types from a slew of other sci-fi movies) but they also have some unique things they do, such as vaporizing human heads so that they can plug their brains into their alien war machines to use as fuel or something. God, at least they tried to do something original!
The characters can be a bit dumb, sure, but it's really not the point of the film There's a few good ones in there to root for, anyhow. Also there are some very dramatic moments that are well done, and the ending is straight video game (but an awesome video game
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