Class was in session today on Twitter as NewsBusters’ Noel Sheppard and Huffington Post Washington bureau chief Ryan Grim debated the concept of “unused capital,” launching from a post by CNN’s Hillary Rosen.

Stagnant pools of festering capital? Economics is usually so boring, but you make it fun. Tell us more!

Look, no one wants to step into a pool of festering capital. Where should we be looking for these swampy areas?

Hmm, where have we heard about Swiss bank accounts recently?

Looks like it’s time to show the other guy he’s not facing reality — by invoking a movie.

This fight looks like it might be drawing a small crowd.

So what do banks do with the money if not stuff it in mattresses?

We get the feeling someone’s waiting for the bell to end this round.