Well... [He forms his own energy between his palms. He's never really had to explain this before.]

When you draw that power, it comes from your core, correct? When I fire, it's simply a force that continuously projects out, as if you were using a...garden hose with one of those silly nozzles attached to it or something of the like. And that's just the basics.

[She lives on Earth, she'll get the garden hose reference. He's not too great at this whole teaching thing...]