I was surprised too. Anyone have a video of a drone infecting another drone?

The symptoms of infection should be obvious:

    var actions = [
      function () { up(Math.random() * 2 - 1) },
      function () { left(Math.random() * 2 - 1) },
      function () { turn(Math.random() * 2 - 1) },
    ];
    actions[Math.floor(Math.random() * actions.length)]();