What the heck is Dance Dance Revolution?
You ask and you shall recieve. DDR (Dance Dance Revolution) is a game that requires you to "dance" according to how the arrows appear onscreen while listening to incredibly cheesy 90s techo.
Did I mention that its addictive? If anything, this game requires the most skill of any video game on the market. You need to have rhythm, speed, stamina and excellent feet/eye coordination to actually complete the high difficulty.
Here is a good link of videos that give you an idea how the game is played: http://www.ddrfreak.com/phpBB2/viewtopic.php?t=90266
I stumbled upon it back when I was a real hardcore player of this game. Now I can barely get pass standard ;_;