Greg was wishing hard that he wouldn't be called. He wanted to make a good impression, but he had no idea of what to say about Muggles. When/if called, though, he'd immediately stand up and introduce himself before confessing, "Uh, I dunno much about Muggles 'cos I never cared much 'bout them. I know they steal magic from innocent people and, uh, they've got these metal thingies, I dunno what they're called, that hurt people worse than wands do. That shows how nasty they are." He paused. "I dunno anything else."