This brilliant comedy horror from 1999 manages to get both genres spot on without diluting either. Starring the always brilliant Seth Green, Idle Hands is the story of seventeen year old stoner, Anton Tobias, who finds his right hand has become possessed and is intent on murdering all around him. The movie is a bit like a cross between a Kevin Smith 90s stoner comedy (Clerks, Mallrats) and an out and out horror. This is the most critically acclaimed movie on this list - though thats not a difficult title to achieve as it appeals to fans of zombies, stoners, and gore flicks. Also look out for an excellent cameo from punk rock band The Offspring.