Funny story about my physics class in college:

For an extra grade you could present to the prof a project/calculations of your own doing.

I did one on the flows of water in my apartment. I'm waiting outside the profs office and could hear the guy before me presenting his. It was on rocket propulsion. I'm thinking "great" I'm going to look like an idiot. The prof cuts him off and rips into him about plagirism and the student leaves all red faced. So i did my stupid kitchen and bathroom sink presentation and got an A.