An understanding as to how it works would be beneficial for in the event of which it might decide not to! You can't just take it for granted, it's... an energy, and it has to be supplied from somewhere, and as with any energy, it can be expended. That part makes sense from a scientific perspective, it's the details that make no sense.

[Donnie looks back at Leo, his frown pulling back into position. Is he avoiding eye contact? What's with that?]

Uh. Well... I start...glowing. [His nose wrinkles as he describes it. Probably sounds absolutely insane.] Not like, everything just, the purples. -and metal but that's an entirely different reaction on its own. But like...

I can...make things? Out of some kind of energy? It's like...purple light but it somehow solidifies- and get this, I can make fully functioning machinery why are you not looking at me.