The nervous system consist of the brain, spinal cord and nerve fibers. Exercise Improves the brain
You don't really see what type of dangerous situation but since you asked a dangerous situation you could do is a stunt motorcycle guy that rides his motorcycle over a pool of sharks. Or a man who wears red in a Bulls arena to get the balls attention but he risk dying if he gets punctured by one of the bulls horns. Or another dangerous situation could be someone entering a monster cave. Or another dangerous situation could be someone meeting up with a Stranger online. There's just so many situations
