Action films usually include high energy, big-budget physical stunts and chases, possibly with rescues, battles, fights, escapes, destructive crises (floods, explosions, natural disasters, fires, etc.), non-stop motion, spectacular rhythm and pacing, and adventurous, often two-dimensional 'good-guy' heroes (or recently, heroines) battling 'bad guys' - all designed for pure audience escapism. Includes the James Bond 'fantasy' spy/espionage series, martial arts films, so-called 'blaxploitation' films, and some superhero films. (See Superheroes on Film: History.) A major sub-genre is the disaster film. See also Greatest Disaster and Crowd Film Scenes and Greatest Classic Chase Scenes in Films.