I picture it sort of like ghosts in mario.. when you turn around to face it it just stares at you with that innocent "what are you looking at I'm just a normal bunny of the non-humping variety." And if you get too far out of range it goes and humps random things.. trees, rocks, maybe that monster over there... but then it sees that's actually kind of a big monster and turns around to look for a nice mushroom instead.