Rab knew immediately when Guilian lost his control. He was well aware of those moments when it seemed nothing could stop you, but he had to step in lest Guilian rage out of control.
He reached over and grabbed Guilian's arm, forcefully pulling the wand out of man's grasp. "GUILIAN!!" he said in a loud but steady and controlling voice. "That is enough for now. Look at me. Look... at... me." He waited until Guilian had calmed down, then Rab looked into very familiar eyes. They were much like his own so long ago, when it seemed he would never get control.
"That is enough for now," he said calmly, "Now... breathe... steady yourself... come back to yourself... show the darkness it does not control you..." He waited and watched carefully. This was THE critical step for Guilian. If he could not come back to himself... then Rab would have to do what he did not want. He watched... keeping his eyes on Guilian's... and waited.