The baby did something bad.
The baby tackled Professor Snape.
Yes, that's literally what it means.
Severus Snape: (squinting) "Miss Wise seems to be very energetic."
Elvira Wise: "(Tossing her head into a rattle) No, no, no, no, no, I'm actually very quiet!"
The heroine's journey through time travel is not omnipotent, and the professor may be a little overwhelmed, so please bring a lightning rod with you. (Funny)