Quotes / It's Been Done

You have disappointed me, Trunks. You told me you'd show your special power, but all you did was pump up your muscles, and there is nothing special about that.
Perfect Cell, Dragon Ball Z

Eh, it's been done.
George Harrison on the Be Sharps, The Simpsons

If you're looking to cash in on the next big idea, the smart money is that it was already written about in a Donald Duck comic.
http://tvtropes.org/pmwiki/pmwiki.php/Quotes/ItsBeenDone