"I have a tortoise," she says, giving him a smile. "And I read a book on identifying reptiles once." It was one of the many books Sherlock had left by her door when he was still training her as a detective. She had read it with some impatience, since she didn't understand what it could possibly have to do with being a detective. "It did come in handy to identify a gila monster bite."

She steps back from the machine to look at the man. "It depends. Usually machines like this are rigged. But I don't know if any of that applies here."