Oliver wondered what exactly these creatures were referring to, but he was fairly certain Sally would explain further. They could be any number of things and he idly wondered if he'd unknowingly encountered them. "Then you're better off than some people here," Oliver noted, smiling lightly. He knew how far denial could go.
"Weeping Angels?" Oliver frowned, trying to recall a time where he'd heard that name. Finally, he should his head. "No, I haven't heard of them. I take it they're not something to be messed with?"