Yep, in a way the meaning is "as one man"The idiomatic English phrase “as one man” refers to several people doing something at once, and in harmony with one another. When...multiple people are acting simultaneously, or “all together.” A similar alternate meaning for this phrase is that a group of people agree on something totally, or feel the same about it and act decisively as a group.
Many times, English readers might use the phrase “as one man” to refer to physical activities that seem choreographed, or other cases where people act in a concerted way.
Source:http://www.wisegeek.com/what-does-it-me ... ne-man.htm
That is, the crowd is technically not human, an "inanimate object", but by saying that it is doing things "as one" you are personifying it. So, it raise, it cheers, it do things "as one" too.
When you talk about people, real people, you can say they did something in unison:This structure favored the privileged classes, as the clergy and nobility tended to vote in unison, united against the urban representatives.
There is, those classes voted as one