Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Brainless entertainment and a lot of fun

Two young American software whizzes go to Moscow. They encounter aliens from outer space. As the aliens power down everyone they start to power up our essential minerals. They are electric by nature and want our copper. The world is now without electric power. Our two Americans, along with two young women, one American and one Australian, find themselves racing through a deserted Moscow trying to stay alive. The Darkest Hour is essentially brainless fun with three reasons to watch. Emile Hirsch is the lead and he's a fine actor. Two Russian actors almost steal the show. One plays a big raggedy electrician who comes up with a microwave gun and the other plays a big, tough cop who uses it (and who also protects the youngsters). The third reason is that The Darkest Hour is a Russian-American production. The movie was shot in Moscow. For those who have been there, Moscow's streets and sites will probably bring back memories.