1. Dance Dance Revolution: (DDR)

2. DDR: DDR has brought video games into dance culture. That's the revolutionary part of Dance Dance Revolution

3. the game looks like a combination of high-impact aerobics

4. an arcade game that debuted in Japan in 1998 and made its way to the United States a few years after - to step, stomp and jump along to the Asian techno-pop songs.

5. class and a legs-only version of Twister. A player stands on a metal pad in front of the DDR machine and chooses a song. Once the song begins, the game screen shows a series of arrows pointing up, down, left and right. As the arrows move toward the top of the screen, the dancer steps on the corresponding arrow on the metal pad. The faster the song, the faster the player has to step and jump. And the more accurate and timely the player's steps are, the higher he or she scores.