District 9

Director Neill Blomkamp's sci-fi film, District 9, is getting rave reviews for its gritty, hard-edged depiction of a futuristic world where stranded aliens are being evicted from one dismal slum and forced to move to another -- when all they really want is to get the mother ship back up and running so they can return home. Among the the more useful alien technologies is an "energy weapon" based on a Tesla coil.