A myhthical, probably asian or specifically japanese, man that came from another dimension to inflict terror on two men. One man was completely oblivious to the Ninja, but he eventually causes the demise of him by pushing him out a window. The other man thwarts the attacks of the ninja, one method by pwning him in the face with a gate. The ninja's abilities include smoke teleportation and randomness.
Dude, did you see "Return of the Techno Ninja" yet? I heard the Techno Ninja dies.