"That is your choice, but I would advise against it," Again, his tone is completely neutral and polite but there's just something that seems ever so slightly snarky in his tone.

He tilts his head slightly, analyzing the size of the room and her breathing for half a moment before making eye contact with her again.

"If you did choose not to leave you would have seven hours and... three minutes until the oxygen in the room would be depleted to the point that you would no longer be able to remain conscious," He offered helpfully, "It would take another hour, or so, before your organs ceased to function due to the lack of oxygen, though permanent brain damage might occur sooner."