Lord of the Rings meets Harvey.
Early in the march out of Rivendell, Merry goes behind a tree to take a leak, meets a 7 foot tall rabbit who warns him to be wary of the creature in the waters outside Moria.
Every so often thru the adventure Merry just seems to know shit, shit he could not know, SHOULD not know. No one ever sees the giant rabbit, and keep scoffing, but the warnings keep coming true... and SOMEONE is certainly stealing the pipe weed....