It remembers Serph, and the form that he first appeared in on the battlefield - it has to wonder if that's something similar, though Serph had seemed pretty in control of himself, and of the transformation. Briefly SecUnit considers and discards the comparison, but decides against it. It's learned its lesson about sharing other people's information. (Not that it would actually be telling Jack something he doesn't already know, in this situation.)

But the 'locked up' part...

Actually - first, it glances pointedly towards the nearest exit from the car. The moon isn't visible out there, but 'looking up' tends to communicate the point well enough. "Any clue how that works here?"