There are many diffrent extreme sports in the world, such as jumps with a parachute, extreme slopes of the mountains. Consider  jumps with a parachute, for example.
Jumps with a parachute have pros and cons. Now, I tell you about pros. 
People value Jumps with a parachute, because it is simplicity and reliability of the parachute. You can understand how to do that without help of outsiders. You can try to jump alone. For Jumps with a parachute you don't pay very much.
But Jumps with a parachute have some cons. There are some cons of Jumps with a parachute: the need to prepare for the long jump, no possibility to control a parachute.