Enough to make a Nerd Squee!
Okay, this has got to be one of the better and more hilarious acappella performances I've seen lately. It's by a group called "Redefined."
Remember the original Nintendo?
Well, here's the, um, acappella version! Mario, Tetris, Mortal Kombat, Zelda and others. Download it here!
(Right click and "save target/link as" please)
Guaranteed to make you smile.