"Sure. That's not the first time something's tried to get inside my head." Or even the second. Or the third. It happens pretty regularly, actually.

"I've upgraded the shielding a few different ways. Randomly oscillating neural frequencies, that kind of thing. But that was the first time anyone got in through Extremis directly, so Aya - she's an organic AI, if you haven't met her yet - helped me encrypt my brain." He chuckles. "That was pretty weird."