How is “power down” used?

In Avengers: Age of Ultron (2015), one line is: “- No, no. Go on. -”

Which movie is “power down” from?

The clip at the top of this page is from Avengers: Age of Ultron (2015).

- No, no. Go on. -

7 作品で登場 · 1 本目

to stop a machine, especially a computer, by turning off the electricity supply

5 本の映画に登場

to stop a machine, especially a computer, by turning off the electricity supply
We were told to power down at 9. 45.

定義：Oxford Advanced Learner's Dictionary 第 9 版