SCP Tales, Episode 9 - “Revised Entry” [SCP-173]
“The majority decision of the remaining O5s is that this is an XK, and they're gonna deal with the problem, or the Russians are.”
SCP-666½-J - The Roaring Flames of Hell
Subjects often experience shortness of breath, extreme jaw pain from the clenching of teeth, and mild bruising on hands from putting the rim of the toilet bowl in a death grip.