I usually steal that line from the Night Watch and use on my kids when they want something they can't have. One of my favourites. I also use "Oh wailey wailey" on my wife too. It usually gets me out of hot water. Usually.
Speaking of my wife, she told me about an assignment she had when she was still in school in English class. To write a story based on the Vermicious Knids (from the Glass Elevator). She basically took part of the plot from Spaceballs to explain that the Knids had squandered their own oxygen and needed the Earth's. She hadn't intended to steal the idea, she assumed it was obvious were it came from, but was shocked when her English teacher gave her so much credit for coming up with the idea for the plot. She had to then explain to him where the idea came from.
The point being that had he seen the film first it might've seemed so obvious that he would've seen it for what it was. As he hadn't then if (assuming it hadn't been explained to him) saw the film after he might've seen it differently. It all falls to perspective.
Another example is that when reading any of the Wiz(z)ard books, I understood were the 8th son of an 8th son thing came from. A former colleague of mine didn't. When I introduced her to a book that mentioned 7th son of a 7th son, she couldn't get her head around it. Her first reaction was to call it a "poor man's Pratchett" even though there was no comparison to TP.