How is “out on a limb” used?

In Silver Linings Playbook (2012), one line is: “- You OK? - I am out on a limb for you”

Which movie is “out on a limb” from?

The clip at the top of this page is from Silver Linings Playbook (2012).

- You OK? - I am out on a limb for you

7 作品で登場 · 1 本目

In a risky or exposed position by saying or doing something bold that may fail or be rejected; not supported by other people

くだけた · 7 本の映画に登場

編集映画の 67%
In a risky or exposed position by saying or doing something bold that may fail or be rejected
I don't know, I haven't felt with anyone else, and going out on a limb, but would you want to spend more time together?
- You OK? - I am out on a limb for you
オックスフォード映画の 33%
not supported by other people

定義：Oxford Advanced Learner's Dictionary 第 9 版