This video checks whether various extreme-sports clips are real or fake. Many rooftop parkour and high-altitude diving scenes are actually created with post-production effects, making them look far more dangerous than they are. Some clips show precision jumps or trampoline stunts edited to resemble life-threatening situations. A few, however, are real—such as performances by professional parkour athletes or the human cannonball act at an American expo, both carrying extremely high risk. One real