Hey guys! I am going NUTS trying to find this frickin fic I read awhile back.
TW: child abuse, human experimentation, claustrophobia
In it, McKay has been keeping secrets about growing up in some facility his parents gave him away to where they keep him in isolation and fill the room with gas that gives him some kind of superpower. Kavanagh tricks him into getting trapped in a tank I think-- a desalination tank? And then McKay get triggered and melts the inside circuitry. Zelenka is all pissed at Kavanaugh on McKay's behalf.
Thanks so much guys! All the best to you weirdos