buildering /urban climbing
sky walking / structuring
城市建筑物攀巖
They are the act of climbing on the out side of buildings and other artificial structures.
它們都是指在各種人工建筑物外部攀爬的行為。
free solo climber 自由單人攀巖者
These activities are usually done at night because it is illegal and dangerous.
這些活動通常都在晚上進行，因為它們非常危險且違法。
Usually there aren't any special safety measures put in place to protect these climbers.
通常攀爬者身上也沒有什么特別的安全防范措施。

ambulance 救護車
What happens if they got caught?
如果被抓了怎么辦？
They would be stopped from climbing further up.
他們會被迫終止繼續往上爬。
NYPD: New York Police Department
紐約市警察局