How to pronounce “jerks”(verb) in English

and your your iris contracts or I hit your knee with a hammer and uh your your your leg jerks upward we also know that there's a part

I shine a light in your eye and your iris contracts, or I hit your knee with a hammer and your leg jerks upward.

shine a light in your eye and your your iris contracts or I hit your knee with a hammer and uh your your your leg jerks upward.