Ví dụ công khai
If any of the extreme sports can be considered truly high risk, then B.A.S.E. Jumping is that sport. […] Modern B.A.S.E. jumping is believed to have started in 1978, where daring parachutists first began jumping off of El Capitan, a 3,000 foot (915m) cliff high above Yosemite National Park.