I dreamed that I accidentally let the crane run away, but the cranes came back by themselves. What does this portend?

Since it belongs to a friend's family, it belongs to their family. Crane also has certain spirituality. Since you said you could ride it, have you seen your friend ride it? Just because he can ride doesn't mean you can ride. Since you are bound by a bag, you are naturally afraid that he will run away. After all, you can't ride or take things that don't belong to you. Things that belong to others can fly back by themselves.