What fascinates me is how this proves again the principle of "do what you love": there is this guy who wants to launch a rocket from his ass, and you might be forgiven for thinking that it is just about the most pointless activity conceivable ever. But don't you know it, somewhere perhaps on the other side of the country or the globe, someone is inspired by it to improve his life. So it was useful after all...
> whenever the chef of the restaurant he's trying to save appears to have lost the passion for cooking, he almost always says "I need to put a rocket up his ass".
I only recall this once, and he was referring to the arugula they were cooking with, which is called rocket in Britain. He didn't say a rocket, but rather referred to shoving the arugula up the ass of someone who annoyed him.
So, no. It's the author's misunderstanding due to regional linguistic differences.