Protesters formed 'a human chain' [=they stood next to each other with their arms linked] around the ancient tree to prevent it from being cut down.
In the United States, the President as the commander in chief is at the head of the military 'chain of command'.
I thought he really won the lottery but he was only 'pulling my chain'. [=he was only playing a joke on me]
(..) are getting exactly what they deserve? No. They're getting paid over or under, but someone in the chain always gets bamboozled." "I steal, Son, but I don't get caught." "That's my contract with society." (..)2015 TvShow: Mr. Robot Title: eps1.0_hellofriend.mov Season: 1 Episode 1