He buys 'I'm fine' just as much as he would if it was coming out of Peter's mouth, but Nathan's a little distracted from arguing. "Peter did this?" He sighed at the look he got from Mary. "He is the good one." He promised her, and under normal circumstances, he would be.

"I think it's a glitch." Nathan headed out of the room, going into the kitchen to get some ice. "Give me a minute."

After digging around, he wrapped an ice pack in a towel and brought that back along with a bowl of water and a facecloth, with peroxide under his arm. "Sit back, alright?" He'd clean up what he needed to, and deal with it from there.

"He's contained in the Sanctuary right now," Nathan hated himself a little for talking about Peter like that, setting everything out on the coffee table. "They're taking care of him until something can be figured out. It's Sylar's ability, he can't control it."