The door was stuck, but I 'gave it a jerk' [=pulled on it very hard and very quickly] and it opened.
He 'jerked' his head in the direction of the door and said, “Let's go.”
He said that they were just a bunch of 'knee-jerk' liberals.
(..) There never was a "we". In fact, without me, there wouldn't even be a "you"! Just up the hill . Listen very carefully. I'm not g-o-i-n-g. Fine. Be a jerk. I'll take care of him . Go. Yeah, that's good. You take care of him? You can't even take care of yourself. This I gotta see. (..)2002 Ice Age