In the grand scheme of things, Tony supposed it was much better for all of them if Bruce was feeling overconfident about a delicate, risky surgery he'd only ever read about than feeling too stressed about it. Because while Tony wasn't 100% sure it wasn't something he could handle on his own (he'd done some reading in his life, too, and so far that tactic had served him well enough when throwing himself into delicate, risky situations even without JARVIS' help), the odds were definitely stacked against him if he had to perform brain surgery from the back of a raging Hulk. The comfort that he couldn't have possibly been chipped himself was a cold one.
"For you?" Tony still thoughtfully offered as he kicked open a few cupboards, just in case. Why he happened to have the oxygen mask on hand in his workshop, much like the LMD, wasn't volunteered information as Tony took his described place, and only realized once he was there that he was, in fact, playing nurce. "Are you sure I shouldn't be doing this? You advise, I mean. I have much steadier hands."