Actually, I think the most absurd line (again Sark's), is right after Flynn, Tron, and Ram escape from the Lightcycle grid, and Sark is fuming.
His aide says: "We'll get them, sir!"
Then Sark says: "We'd better, null unit!"
What the heck is that supposed to mean, exactly? I guess it was meant as an insult. I don't think that progam's actual designation was "null unit".
P.S. Nikster, I think your new avatar is adorable.