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]
(..) So he's on one of the serious Tour 'de France bikes, you know with the, like the toeholds, right And uh, he's peddling. And the zombies head is like caught in the gear. You know with the hair and the chain just like, going around. Very cool. - Yeah. - But.. Zombie-kill of the week.. no sir. (..)2009 Zombieland
(..) that don't make sense at all, like... Clowns, with red noses, or like the rag that use to wipe on table. when you finishes eating, like a.. chain restaurant. - Really? - Look, the point is I'm here for you, okay? And as long as you're by my side, I'm not leaving this apartment. (..)2009 Zombieland