"Mathemagician" TED Talk

I have never seen such a large memory, and calculation skills in a single person. This wasn't really much of a "talk" but more of a way for the presenter to show off his amazing skills at retaining vast numbers and calculation answers to equations such as 836 squared before you can enter it in a calculator, and correctly too. Not only could he solve mind-boggling equations in mere seconds, he could also get a specific day, if given the date. So lets say your birthday is November 27, he can find out the day just like that. Not to mention the few jokes he threw in here and there, this presentation was pretty well thought out. Other than errors it was pretty great.