Little Baby Balloon is awakened by a nasty nightmare, so he decides to get into bed with Daddy Balloon and Mummy Balloon.
Alas! there isn't enough room in the bed for all three!
Baby Balloon, being very clever, unties the knot in the top of Daddy Balloons head and releases some air, but there still isn't enough room in the bed for all three.
So Baby Balloon unties the knot in the top of Mummy Balloons head, and releases some air from her too, but there's still not enough room.
Baby Balloon sighs, then undoes the knot in the top of his own head and at last he can fit into bed with Mummy and Daddy Balloon.
The next morning, Daddy Balloon pulls Baby Balloon asides and says
"Listen Son, I know what you did last night. You've let me down, you've let your Mother down, and worst of all, you've let yourself down...."