Eoin was in some pain - well, a lot of pain for a little bit when it fully registered in his brain and he clutched at his hand and hissed. "I'm fine, I'm fine," he insisted, trying to keep Diana from grabbing his hand while it was still stinging. He hadn't been burnt that badly - not really at all, it might have been a little bit painful, but it wasn't like he'd stuck it on a branding iron or something.
Standing up straight, he smiled a little and showed his hand, which looked fairly okay by now, to his two flatmates. "It's okay, ain't anything to get excited about. Just didn't notice it before, is all. Don't need any Dittany," not that it would have done anything to him, "Bloody hot, though, yeah," he nodded at James, "Water's ready." And he immediately grabbed a potholder and poured some into his mug, stirring it around with a spoon someone had left by the stove some time ago.