Reasoning

 As Roselyn was struggling to breath, Corey was having a mania c smile on his handsome face, consumed by his the want of wanting revenge, he didn't see the pain in the eyes, of the only friend he ever.

 Lyn didn't know what to do, if this continues, Roselyn will die in the matter of minutes, with her standing still and being the cause of it all, she couldn't call Jack, he's too far, she only had one choice, to rescue the one that's going to save everyone, her last card, she didn't expect to use so soon, but it's only way to save Roselyn, it's to stop time.