buildering /urban climbing
sky walking / structuring
城市建筑物攀岩
They are the act of climbing on the out side of buildings and other artificial structures.
它们都是指在各种人工建筑物外部攀爬的行为。
free solo climber 自由单人攀岩者
These activities are usually done at night because it is illegal and dangerous.
这些活动通常都在晚上进行，因为它们非常危险且违法。
Usually there aren't any special safety measures put in place to protect these climbers.
通常攀爬者身上也没有什么特别的安全防范措施。

ambulance 救护车
What happens if they got caught?
如果被抓了怎么办？
They would be stopped from climbing further up.
他们会被迫终止继续往上爬。
NYPD: New York Police Department
纽约市警察局