[It's actually his first time in the library — it's only since he was woken from the dream world that he's taken to actually going inside, and only today that he found this room in particular. He first sees her climbing the shelves on the opposite side of the bookcase he's standing at, through the gaps above the books.
So he circles around to the other side to reprimand her for climbing, naturally, and then— she slips.
He rushes forward just in time to put himself between her and the ground; she's small enough compared to him that catching her isn't too strenuous. It's mostly the suddenness of the manoeuvre that brings him to the ground. But his arms are wrapped securely around her, one under her knees and one around her back, and his body cushions the (now minor) impact with the ground.
evening, library
So he circles around to the other side to reprimand her for climbing, naturally, and then— she slips.
He rushes forward just in time to put himself between her and the ground; she's small enough compared to him that catching her isn't too strenuous. It's mostly the suddenness of the manoeuvre that brings him to the ground. But his arms are wrapped securely around her, one under her knees and one around her back, and his body cushions the (now minor) impact with the ground.
That was close!]