Of anything he might have expected following that initial phone call, Cassian certainly was not prepared for this.

He stares wide-eyed and confused and startled by the overflowing admission, torn between the emotional gut punch it is and the erratic rush of her breathing. He clambers to his feet and hurries over, worried it's going to send her into some kind of panic attack and just make all her injuries feel ten times worse.

"Jyn," he tries to keep his voice soft, soothing. He even holds out his hand, brushing his fingers over hers in case she wants to take it. "Jyn please, slow and careful breathing. You do not - now is not the time to work yourself up. I do not want you to hurt yourself more."

He doesn't know how to address... any of what she said. His emotions were already in overdrive from the accident, and now this, combined with his overarching concern for her well-being - he can't think on it. "We can talk later, okay? I promise. But now - please try and take a slow breath."

Not deep, because that might her her chest, but something, anything to quell her sobbing. It's still in him, that deep seated need to make sure she's okay.