[JapaneseTeeth]

He's referring to The Melancholy Of Haruhi Suzumiya.

I'd put a spoiler warning, but anyone who's that interested in the show probably knows this by now:

Yuki is a pseudo-robot/human computer program that has a limited ability to "reprogram" reality. It's similar to the Code of the Lifemaker, but based more on science than magic.

The idea of Asuna pulling something like that is certainly possible, given that she's a descendant of the Lifemaker and everything. That's the source of her magic cancel abilities, although whether that means she inherently has the Lifemaker's other abilities is up for debate.