Fuwa Rescue arrives at a dangerous scene where there's a risk of a dust explosion. Judging by the unnatural feel of the scene, they deduce that it may be arson. Realizing that the perpetrator is still inside, Shun reenters the facility despite the danger.
That's all it took for Shun 
to be able to do this much.
.ذلك ما تطلبه الأمر ليتمكن شون من فعل كلّ هذا
Eso es todo lo que necesitó Shun
para dar el paso.
Eso es todo lo que necesitó Shun
para dar el paso.
Cette seule raison lui suffit
È bastato questo perché Shun
Foi só isso que precisou
para ele fazer tudo isso.
По этой причине Сюн
идёт на всё это.