Like the universe itself, film is a fragile medium that can produce monumental changes with just the slightest tweaks, twists, or turns. In life, a decision to stop off for a loaf of bread and a six-pack of beer on the way home from work can mean the difference between a lonely weekend and meeting the love of your life. Likewise in film, a change of genre can result in a vast improvement over a weaker effort or a new creation of wonder and excitement equivalent to its original source. Such is the case in this week’s Reel Rumbles as two modern classics go head-to-head, each taking a previous film comedy and twisting the concepts into different genres for fresh, exciting, and provocative filmmaking. Taking its cue from the less than stellar Dana Carvey comedy Clean Slate (1994), Memento revitalizes the film noir genre with a mystery told in reverse, while a touch of teenage angst and ominous foreshadowing makes a classic like Harvey (1950) into a dark and supernatural tale of apocalyptic proportions. So question your identity, follow the clues, and leap through the time travel continuum, it’s time for Donnie Darko vs. Memento.