"Ouch," he said as he flinched, which made Ant's little eyes widen. Tony couldn't imagine the feeling of someone drilling into his skull. It was bad enough that'd he'd felt some of the initial surgery when the first electromagnet had been put into his chest, only to be knocked out when he'd gained enough consciousness that he'd started to fight the ones holding him down. Either way, both were equally scary to imagine and worse to experience. "All of it is trial and error, even if you're a genius. Have to keep testing until the right thing comes along to point you in the right direction." He pulled the bottle out of Ant's mouth to give him a chance to pause and digest what he'd drank, then wiped his mouth with a little cloth. "Someone's getting a little round," he said as he patted the baby's belly.