If you were looking to quickly understand how you might someday put Google Wave to good use, then this two-minute video makes a lot of sense. That's not what these videos are about.
If, on the other hand, you want to see someone having a little fun with Wave and its support for real-time conversations and multimedia integration, these videos are a good watch. The first, above, reenacts a not-safe-for-work scene from Pulp Fiction, while the second, below, reenacts Good Will Hunting.
They're not exactly the most noble Google Wave use cases we've heard, but they're certainly a fun look at Wave.