Danny is quiet for a moment. He didn't really have a good answer for that. Not without admitting that it just felt right for him to volunteer for this kind of thing. That it felt like this was what his powers were meant for.
And that was a feeling that he still didn't understand himself.

But before he says anything, a memory comes into his head.

He was on the rooftop of a building, plugging himself into some kind of strange armored suit. Far above him he could see the glow of a green force field blocking out the sky.

Two teenagers about his age come running out onto the roof. He smiles at them.

"C'mon, guys. You didn't think it was always going to be as easy as shoving the Box Ghost into the Fenton Thermos, did you? I'll be back."

One of the teenagers frowns worriedly. "Danny.... Your Mom used the word fatal."

Danny keeps trying to smile at them. "Guys, I'll be back." He repeats his promise, but he pauses uncertainly. "...But... If there's anything you wanted to say to me... Now might be an excellent time to do it."

In the present Danny comes out of the memory blinking.

"...Because I think I've done this before?"