When John is kneeling before the DRDs to talk to Moya, the head DRD extends a tiny spinning machine gun and points it at him. Twice, when the DRD is filmed from behind, the machine gun stops spinning but is spinning again when the DRD is facing the camera. Especially noticeable the second time as it stops spinning right before the camera switches to a front view of the DRD "standing down" where it stops spinning the gun and retracts it back into the casing.
At Around 3 minutes when Ka D'Argo is sliding down a chute a cable can be seen above his left shoulder controlling the Fall.