It is rude to return things in an unusable condition.
Danny promised to return Jim's bike after a week, but both of its tires blew while riding it.
Danny wants to return the bike to Jim.
Danny gets the tires replaced before giving the bike back to Jim.
Danny gives the bike back to Jim as it is.
Jim thanks Danny for returning his bike in working order.
Jim gets mad at Danny for ruining the tires on his bike.