I don't know if this classifies as hardcore, but it shows one of many possibilities of AngelScript:

Mighty Switch Test, by VioletCLM. You can click on the .j2as-file to get a preview of the document. That'll show you the lines of code used in this particular project.

Basically, AngelScript is a tool that, as the name implies, allows you to script events and things and magic and do the things you could never hope to achieve in JCS. It adds another dimension to JJ2, and offers possibilities I can't even imagine.