This seems like a cool idea but I'd have to see it in action for something I need to learn. The first thing that jumps to mind is that I want to click on a pie

This seems like a cool idea but I'd have to see it in action for something I need to learn. The first thing that jumps to mind is that I want to click on a piece of code and see the explanation for it. It seems that it only goes in the other direction. I could imagine looking at the code and understanding most of it and just wanting to understand part of it. I could anticipate an issue though - it could be many-to-one from explanation to code. The UI for that would be complicated.