What the hell does "Mystic Fry" mean?

It come from a funny dialogue of a 80's film, "Short Circuit", that I loved when I was child! It speaks about a military robot prototype called "Number 5". A power surge hits Number 5 while it is recharging and alters its program, causing a malfunction. Another accident causes it to be taken outside company grounds and it wanders off, unable to communicate and not knowing where it is.
Watch this to refresh your memory.

Probably this dialogue there is only in Italian version because it's based on italian words. The funny dialogue starts when two men are worried about what malfunctioning robot could do:

(translation from Italian)
-- "...... and if he meets a bus of nuns and fry them with his laser, how do you image the newspapers' titles tomorrow???
-- "Mystic Fry!"

explanation: in Italian "Mystic Fry" is "Fritto Mistico" that sounds like "Fritto Misto", and "Fritto Misto" is "Mixed Fry" in English! Have you understood? Haven't you? It doesn't matter! The important thing is that it have to be funny for me:-p

bye