直升机视野
BASE jumping, also sometimes written as B.A.S.E. jumping, is parachuting 或 wingsuit flying from a fixed structure or cliff. “BASE” is an acronymthat stands for four categories of fixed objects from which one can jump: building, antenna, span, and earth (cliff).[1][2] Due to the lower altitudes of the jumps, BASE jumping is significantly more dangerous than skydiving from a plane. ( Wikipedia )