From our sister site, DVICE:

Are you a Street Fighter addict? If so, this keychain is for you. It looks like a mini video game controller, but it'll really help you practice your moves. Every time you accurately enter a combo move for Ryu, Ken, Dhalsim or Chun-Li, it'll make the corresponding sound.

So instead of doing whatever it is you do when you have a free minute on the subway or in a doctor's office waiting room, you can practice your moves. How awesome is this thing?

Strap-ya via TokyoMango