As Mansur is riding the horse through the gauntlet, arrows are fired at him from both sides, but none of the arrows that miss him, hit anyone else on either side.
In the scene where Erali and Gaukhar are on the swing, you can clearly see a string or wire attached to the handkerchief/scarf.
When the chief of the Jugars is riding a horse that had just been picked by Oraz, dust left by a vehicle can be seen in front of him, even though he is supposed to be ahead of all the riders.