While Arlo would have very much liked to storm off, he was one of the few senior staff on site. As such there were certain expectations he had to fulfill. After ensuring the relative calm and safety of the Spell Damage ward, he was asked up to the cafeteria to give his own account and hopefully seek more information about exactly what happened.
Instead he was tasked with trying to coax a hysterical employee from where she had holed up in the pantry. "Catherine." He sighed, but remained calm. "I can assure you that there are no less than two law enforcement officials out here. There are no death eaters in waiting. The area is safe. And we're worried about your safety."