An imaginative story

This morning, Caroline seemed a little concerned about something...

C: There might be a hippopotamus under our floor. I heard something that sounded like a hippopotamus. He might try to take one of my toys!
Me: I'm wondering what makes you think of a hippopotamus?
C: Well, it happened to Lilly. A hippopotamus was under her floor, and it came and broke her dollhouse. It made a crack in the side of the dollhouse, but we were able to fix it with tape.
(Lilly is her imaginary friend - she's a mouse)

Okaaaaay...