@theconfusedyeti@tech.lgbt @bumpus What she said. It helps to demonstrate how thin the line between the two sides of the coin is, and how easily it can be traversed. But beyond that … there be dragons.
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.