Ping Pong.

[-Geshtar-]

http://www.albinoblacksheep.com/flash/pingpong.php

[Blatt4Life]

Heh I have seen this before, only the one that you posted is blurry. I will see if I can find a link to a better one.

[Ness]

I've seen that already, but it was named "Matrix Ping Pong."

[goku4ever]

http://www.ntv.co.jp/channel/kasoh/kin10.html

its smaller but not blurry