How is “beside yourself” used?

In The Letter (1940), one line is: “I cursed him. I was beside myself.”

Which movie is “beside yourself” from?

The clip at the top of this page is from The Letter (1940).

I cursed him. I was beside myself.

5 作品で登場 · 1 本目

unable to control yourself because of the strength of emotion you are feeling

7 本の映画に登場

オックスフォード映画の 100%
unable to control yourself because of the strength of emotion you are feeling
You were, you were really beside yourself.

定義：Oxford Advanced Learner's Dictionary 第 9 版