"It can be whatever the hell it wants so long as it keeps you alive," Donna nodded. Confidence, stupidity, running... if it worked, she had no problem at all with it. Neither should anyone else.

So it was a fact that this kid couldn't die? Well, if he said so...

"With the things I've seen before, I'm fine taking your word on that one." Though it was true Donna hadn't actually seen something that couldn't die, even when it came to like... Robots and stuff, but she'd rather take his word for it than get what she could only assume would be a strangely horrific display. Probably bloody too. "I'd be crazy not to believe you anyway. You'd have to have been some kind of immortal to not have gotten offed from your attitude. Do you always play this nice with others, or am I special?"