You should not be in there without a way to breathe clearly.

[Even Reinhardt, with his helmet, can tell the air is practically toxic with decomposition. But that won't stall them for long. He has to act.]

Do you know Angela? The doctor? If you run to find her, and tell her what we found, I will wait here.

[Anything to get Frisk out of the area. To spare them as much as he can. Getting them out of here is a small mercy, when they've already seen.]