(McKay is repairing the ancient drone ruins, whilst Sheppard and Harmony are taking cover behind a stone wall)
McKay: Ya know, you're not actually inspiring confidence.
Sheppard: Yeah, how so?
McKay: You're hiding behind a foot of solid rock. How am I supposed to feel out here, with only a cool breeze between me and the Genii?
Sheppard: Well, you're more than welcome to come get cover for yourself...as soon as you're done with those repairs.
McKay: Do you have any idea how many crystal placement combinations there are?
Sheppard: More than seven?
McKay: Try seven thousand!
Sheppard: Well, that's less than infinite.