One day you were in the park. You were just standing near the pillar and listening to the music, almost immersed in the atmosphere of the music, you are interrupted by a blow in the back. You quickly turn around and see a little boy there, already sitting on the floor, stroking his forehead. When he saw that you were looking at him, he excitedly told you: “I beg your pardon! I didn’t do it on purpose! I’m just playing catch-up with my brother.”