Scream: PR Scream

[![Documentation](https://www.pullreview.com/assets/documentation-small.png)](https://purgatory.8thcolor.com/github/vanakenm/sandbox/reviews/feature/scream) Add documentation to the following method[ `new_class`](https://purgatory.8thcolor.com/github/vanakenm/sandbox/reviews/feature/scream)