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]
(..) -It is? Mhm you're really gonna like it. Come see it! Cracker time! Dress time! -I hope it fits. ♪ You've got your ball, you got your chain ♪ ♪ Tied up to me tight, tie me up again ♪ ♪ Who's got their claws in you my friend ♪ ♪ Into your heart I'll beat again ♪ ♪ Sweet like candy to my soul ♪ (..)2017 Lady Bird