Hank (Paul Dano) is stranded on a desert island, contemplating suicide when he sees a corpse (Daniel Radcliffe) washed up on the beach. Hank soon discovers that the corpse's flatulence can be harnessed to escape from the island and together they set off across the open seas. When they reach a wilderness with evidence of human habitation they begin a trek through the woods back to civilisation. The dead man, Manny, seems to be able to speak and Hank discovers he is able to perform other useful functions, dispensing water and creating sparks (hence the title for the film). This is an unusual comedy drama about life and death. The two men both seem to learn something about both as they journey together through the woods and become firm friends. There are some hilarious moments, mostly relying on childish jokes about bodily functions, but also some very touching scenes as Hank recounts his various childhood traumas, his struggles with loneliness, depression, rejection and other issues. The film won't be everyone's cup of tea, but if you are looking for something a little different then this is definitely it.