I honestly don't know. Jono hadn't even thought about that aspect of it. If he could get hurt, how much it might take to hurt him. What he might be able to survive that others wouldn't. I've not given that a go...
Now, of course, he was highly curious. He wondered if there were any kinds of training classes that explored such things.
Professor Xavier? He's the one that sent me the bandages while I was in the hospital and extended the invitation here, but I haven't sat down to talk with him about any of these particulars. You think I should?