[Once she lowers her weapon, he does the same, stowing his arrow back in the quiver and lowering his bow. Alright, this is getting really, really weird but okay.]

I mean, this isn't really the best place for it - but I have a feeling I'll understand.

Maybe. Can you explain why a SHIELD agent is crawling through the vents on home turf? That's probably the most pressing part.

[And the one that he can't let slide. It's easily the most suspicious part of everything.]