Mathemagic

How can I put this bluntly? I thought that guy was lame. Yes, it was cool that he can square large numbers in his head really quickly. Bottom line though, who cares? Not me. He should be using his mathematical talents for things that actually matter, like engineering or something, not to wow an audience that didn't even notice when he made a mistake. Maybe I'm unimpressed because I know people who can do that, but for the most part I really just didn't care.