"TADASHI, NO!" Hiro grabbed Tadashi's arm with a firm grip to stop him from wrecklessly running into the fire to save his teacher. Hiro gave Tadashi a pained look. All he could think about was loosing his brother at that point and refused to let go. Tadashi gazed up at the burning building for a brief moment and looked back at Hiro right in his large eyes.
"Callaghan's in there. Someone has to help!" Tadashi sternly told Hiro while attempting to escape from his grasp. Hiro held on tight though, holding on dearly for his only brother; his only close living family. He was struggling to keep his grasp, with Tadashi still having his mind set on helping his teacher rather than staying with his brother.
"Hiro listen to me." Tadashi grabbed Hiro's shoulders and bent down to his level. "If I don't help him then nobody will!" Hiro couldn't even speak. Time felt as if it slowed down. Just as Tadashi turned to run up the stairs of the building, it exploded, sending both the brothers flying backwards, knocking them unconcious.