[Before entering the cave full of iratus bugs McKay zips his collar up]

Dr. Beckett:
You don't seriously think that's gonna help do ya?

Dr. McKay:
Well, when they see your neck before mine, you won't think it's stupid.

(later) [Dr. Beckett zips up his jacket before going to collect eggs]

Dr. McKay:
See, not so stupid now is it?

Dr. Beckett:
Oh shut up.