"Considering the circumstances we found ourselves in we have to cope with whatever we can. Thus, decided to devise the most effective weapon I could make from the parts I had handy. The result of my efforts is a metal club wrapped in to a barb wire and a couple other gadgets so thoughtfully that every poor bastard that finds himself on the business end of it is literally pissing blood."
Found in the Laboratory, in the bathroom, in the right-hand stall.
The Bloody Mary Mod is named after the Bloody Mary urban legend in which if a person turns off the lights in a bathroom and says the name three times, something would appear in the bathroom mirror. The mod coincidentally can be found in the Laboratory restroom.