Marathons are not made for sprinters. Or to put it another way: the feature-length format is not the ideal distance for animation sprinters, who are used to cramming all their inventiveness and humor into a short 5- or 6-minute TV film. Perhaps that is why the film titles of Warner Bros.' legendary animated franchise often mixed live action and animation, such as Space Jam. But The Day the Earth Exploded - A Looney Tunes Movie No: It is the first fully animated theatrical film about these mythical characters and, precisely for that reason, it suffers the most from its pacing.