The way Belinda’s Force Tether power worked was to drag every tethered creature towards it. It inflicted little damage to those that allowed themselves to be dragged, inflicting escalating damage to those that resisted. In this instance, the suction points from Sophie’s mirage power did the resisting for them, yanking the gorillas away from the tether rod. The gorillas were physically powerful enough to resist both effects, but the disorienting illusion from Sophie’s power made it hard to get their feet under them.
