Confused sentence; Have there been so many...

[wq.denis]

Hi my friends,
While i was reading a book, i came across with the sentence bellow and could not realize which grammar rule has been used.

"And never before have there been so many black media choices."

Thanks

[5jj]

"And never before have there been so many black media choices."

When the sentence begins with a negative expression, we invert subject and verb:

Never have I seen such a beautiful sight.
Little did he know what she really intended.
Nowhere can you find a friendlier reception.
At no time did I say that.

[wq.denis]

I never seen that rule before. I think that may cause vital confusion for english learners! Better to not use often!

Thank you fivejenjon by the way..