Inverted Subjects and Verbs

In sentences, it is usual for the verb to follow the subject:

Apparently, President Obama was not born anywhere in the United States so how could he become President?  

Genetically modified foods should be banned or clearly labeled but that's not what the United States government wants. 

However, in many sentences with either ‘here’ or ‘there’ e.g. “Here’s the book.” or “There goes our money”, the subject and the verb are inverted.

Inversion is also often used in sentences beginning with adverbs of location /direction.
Out came the sun and dried up all the rain.
In the next room is our new rug.
Out in front of everyone shouting orders was their daughter.
Out there, in the middle of a snowbank, sat a woman in a long, black dress.
And down came the roof just as we were leaving the building.
In marched our boss at that very moment.

When the subject is a pronoun, there is no inversion when the adverb is fronted
Out it came and dried up all the rain. 
In the next room, it is!
Out in front of everyone shouting orders she was.
Out there, in the middle of a snowbank she was sitting.
And down it came just as we were leaving.
In he marched at that very moment.

Inversion is also used to emphasize a comparison to sth said or implied earlier or sth that has come before.
They expected JR to arrive any minute and of course in he came.
That was silly what they did and just as dumb was their reaction when they got caught.
We were disappointed, but more disappointed were our supporters