Anakin had been looking down, silently meditating as the two siblings talked, not really paying attention to what was being said, but the moment Jaina's emotions flip-flopped, Anakin's head snapped back up, feeling her emotions crash against him in the Force. He felt her reaching out through the Force for something that wasn't there. He wasn't sure what it was exactly, but he could tell that it was something or someone that she held dear.
He looked over to her, fixing his blue gaze upon his granddaughter as he did his best to send a wave of comforting, soothing emotions her way. It probably wasn't the best, being that it came from someone who's own mind was tormented beyond word's ability to expression. Still, it was better than him starting to say some awkward words of comfort - especially in front of the boy who had died.
"There's one not a block from here, there--"
Blue eyes wide, he froze. The mental string that was tied to Luke through the Force was tugging at his mind, alerting him to the sudden danger the boy was in. His grandson would have to wait - he was confident Jaina would see to her little brother, anyway - he needed to save his son. He gave Jaina a stern look, before moving to the window, it opening with the Force before the eldest Jedi was even near it. He moved onto the ledge and used the Force to propel himself onto the roof, running and jumping from building to building, headed in the direction of the zoo.