User:Adair.le/sandbox

There is not a lot of information here, maybe I can add some more information on the concept or examples. The 30-degree rule also has another part that is not mentioned in the page so I will add that.

The picture on the page is confusing, so I will find another picture that shows the theory in a slightly different way. Adding another picture will help clarify the rule. Update: I could not upload a picture if I do not own it.

The citations are unclear. There is clarification needed so the citation style is the same throughout the article. Right now the article has external linking and footnotes, it should have one or the other not both.

I would link the example of George Melies to the rest of the content in the article stronger because right now his example doesn't make that much sense.

I added some scholarly sources to the article.