If Jerry were with friends or his son years later, he might begin to describe his experience when he was eleven years old as his departure from boyhood. This description can be in the form of a monologue.
Here are some ideas to include in this monologue:
When he arrives with his mother on holiday at the beaches, Jerry tags along behind her. Still, he yearns to go to a wilder-looking beach where older boys dive and swim. Once there, he feels childish because he cannot dive through a long rock as they do. In addition, their looks when he acts silly to get attention make Jerry feel even more like a child.
After the older boys depart, Jerry tries holding his breath and finding the hole through which the others have swum. But panic fills him, and, defeated, he returns to the villa. Then, one morning his mother informs Jerry that they are soon departing for home.
Resolving to make this passage through the tunnel before he returns home, Jerry practices holding his breath until he has enough lung power to propel himself through the tunnel. When he gets goggles, Jerry tries traveling through the underwater passage, but he cannot make it far enough. However, after many hours of practice, aching lungs, feeling as though he is dying, and bleeding from his nose, Jerry goes back to the wild beach and finally succeeds.
Once recovered, Jerry sees the other boys diving and horsing around a half mile away. But now he no longer wants to be around them. He has made his rite of passage. Once home, Jerry does not even tell his mother. There is no need to tell her; he is content in his knowledge of himself. He has grown up.