He lifted a brow at the man, "This is healing fast. It's not instantaneous, just a hell of a lot faster than any normal human can manage. And it does the internal stuff first. If it's not life-threatening, the resources go elsewhere first and come back later. Besides, I haven't eaten in a while and my resources are low."

And that was a lot more information than Steve usually gave anyone, but he just wasn't in the mood to mince words or be cagey. He hurt, he was hungry, and he was tired. His stomach growled and Steve winced, a little embarrassed. Healing took a hell of a lot of energy. His eyes strayed to Peter's arm, curious about what shape it was in. Did Peter heal instantaneously? It sure would be a useful trick.