Feedback

Again, I'm not actually suggesting that you merge this in and remove all your code. This just makes it easier to leave feedback :smile: 

Please submit a help request for any questions that you have about my comments.

### Don't merge this pull request
This is slightly misleading. `@bounding_area` actually contains an array of instances of `BoundingBox` class. It would be more clear if it were `@boxes` or `@bounding_boxes`.