Toby backs up another step, raising her head higher on her snakelike neck. The clouds of whatever this is, rolling out into the hall now like water, seem to be heavier than air and so she doesn't need to breathe it. Unfortunately the smell doesn't stay with them, and it drives an unhappy noise up out of her throat.

"I do hope," she says faintly, "that whoever is responsible at least knows what they did that it might be averted in the future. That is an unusual smell." From her limited experience it's typically more acrid and less... moldy.