The yak stares at you for a while, blinks a few times. Then smiles.
"Why yes," he replies,"I heard you up there and was
hoping someone would ask me to play! Please, climb on my back and we
shall go up to the surface together."
"Well hello there!" you greet the giant yak. "How are
you doing today? Would you like to join the snow fight we're having
above on the mountain? It is ever so much fun!"