How is Garrus that expressive through the various coverings and heavy sand? And, for that matter, why is he wearing a mask, but not a shirt? Make it make sense, Garrus, please. Though the response does make Koby realize that his "intense psychic" posture is...completely unnecessary.

So he lowers his hands, a little sheepishly, then crosses his arms over his chest.

I'm completely covered up! I'm helping Nadine move her stock to the new building. I'm WORKING. Not...sandbathing or whatever you're doing. Exfoliating? There are easier ways, Garrus!