Douglas effectively conveys the sense of panic by using vivid descriptions and sensory details that immerse the reader in his experience. He describes how he struggled for breath, with water filling his nose and mouth, as he sank deeper into the pool. The author also emphasizes the desperation he felt when trying to reach the surface, with his legs kicking and arms thrashing about. Furthermore, he highlights the disorientation he experienced underwater by describing the blurred surroundings and the distorted sounds. Lastly, Douglas shares his emotional turmoil, including feelings of terror and helplessness, which make the reader empathize with the intensity of his panic as he almost drowned.