Hi! You are right, extreme sports are exciting because they create unique combination of adrenaline and danger. When we face real risk, our brain starts releasing chemicals like adrenaline and dopamine. This not only makes us feel alive, but also creates feeling of euphoria. For example, in freediving you find yourself in a huge depth, where every second counts. It is both physical and mental stress. Interestingly, even if you play video games, like Jetx, where there is no real risk, your body can react in the same way as in extreme sports. Your nerves are tense, and you experience the same stress, although in fact you are safe. This is explained by the fact that the brain cannot always distinguish between real danger and its imitation. You can read more about this here https://www.thexboxhub.com/adrenaline-rush-in-modern-sports/ . But the point is that our brain is literally “obsessed” with these emotions.