This is why I love #Letterboxd so much: every #film is a gateway to hand-curated lists of conceptually-related films—genealogies along every imaginable vector.
Basic models of flocking behavior are controlled by three simple rules: 1) separation: avoid crowding neighbours (short range repulsion); 2) alignment: steer towards average heading of neighbors; 3) cohesion: steer towards average position of neighbors (long range attraction). With these three simple rules, the flock moves in an extremely realistic way.
@semidetached I have had my reservations, but the lists make it indispensable to me.