Her eyes narrowed. "I can't be certain, but I think whoever programmed Fujiwara's 1C built himself a back door. That blue ball was a simple virus meant to pump spurious data into the system so quickly that things freeze up and give me a chance to react with another program. You tossed it through one of the layers we bypassed and right through the back door into their system. That stopped the Iron Horse on his trip to first and I used my own little ALS virus to dust him."