(Note: potential spoiler alert -of a movie that I think pretty much everybody has seen, but who knows...)
The whole plot of the first "Back to the future" movie revolves around the heroes' attempt to generate the energy blast required for the time traveling car to work, so that Marty McFly can go back to his time. To generate the tremendous discharge required, Marty and Doc Brown come up with the idea of conveying a lightning into the car at the designated moment; they can do that because they know when a lightning is going to strike, due to Marty's knowledge of the future.
I think it is by now notoriously well known that Marty McFly succeeds (he also invents rock and roll along the way). Then, in the movie's final scene, opening way to the sequel, Doc Brown appears out of nowhere in a modernized version of the car, and tells Marty to come with him in a new time travel, this time to the future. But this time, to create the energetic discharge for the travel, Doc just goes to a trash can, picks some items (a banana peel, if I remember correctly), inserts them in the car mechanism, and they are good to go. No lightning is required anymore.
I have a feeling that the script writers of that movie were in some way familiar with the scientific method. Or maybe it was just something embedded in their culture in the moment of writing. US, after all, was the father of the Training Within Industry programs, which after WWII evolved into Lean, so there's evidence to show that that kind of thought (scientific method, continuous improvement) is strongly rooted in that country, or at least in some of their individuals.
I remember that banana peel often, mostly when I discover one of my processes turning a bit obsolete. It's a funny and bittersweet sensation, how many times I've thought some way of doing this or that was the be-all-end-all of speed and effectiveness (a list, a layout, a job breakdown, some sort of kanban board...), only to find it a bit later, giving it enough time, well, not very impressive anymore, in fact movingly rookie, cumbersome, Rube Goldberg-ish...
The cause is that iteration after iteration of the process have improved my skills and my training to a new normal, which again, now seems top notch but, giving it enough time it will seem outdated, rookie, etc... All the knowledge, all the errors, all the experiences, are added to the new process, where now I get the same results without requiring the lighting, all it takes is a banana peel (and even that, the banana, is only the basis for the next improvement!). However, of course, the lightning stage was required before the banana was possible...
I have a guitar and I'm gonna use it