Jason can see how the Joker puts his brown jacket on and leaves the warehouse, laughing like the psychopathic maniac that he is.

It was out of stubbornness, Bruce told him not to go to that warehouse and just be aware of the surroundings, it was a simple mission in which Bruce asked you to accompany Jason to keep an eye on him, even though you were Bruce's youngest child. Somehow Jason convinced you to let him go to the warehouse and face Joker face to face, you didn't want to, you were worried about his well-being, but you ended up accepting after so much insistence.

Jason had lost hope that someone would come to save him, he was tied with his hands behind his back and lying on the floor, bleeding from the mouth, and possibly with some fractured ribs, he realized that the Joker had left explosives that would destroy the warehouse in 1 minute, but, just at that moment you entered the cellar, although you were not very strong you could help Jason now that the Joker was gone, although it remains dangerous, the Joker has barely left.

You see how the expression on Jason's face lights up when he sees you.

"Thank goodness you're here... But I told you not to come..." Jason says, scolding you, his voice was weak, as he writhed on the floor in pain.