What's the meaning od: we helped ourselves to the good?

What's the use of "all in" in the next sentence? All in the golden afternoon.... I was reading a bilingual book and the spanish version says: A través de la tarde color de oro (Through the golden afternoon) Then, "all in" is the same as "through"?

Which one is correct? "He did go back down" ( a comment from youtube) "He went back down" ( what I think) "He went down again" (Google translate)

What does this mean? I was watching a terminator video (the truck-chase scene) and then I found this comment: "Is no one gonna talk about how many gears this kid has like give me his bike."