This one goes out to anyone who has ever replicated machine guns, motorcycles or monster noises with their own mouths.
A creative modder released a Doom mod last week that replaced all of the game's sound effects with home-made noises. And then the folks at gaming site Rock, Paper, Shotgun were kind enough to test it out, creating the above video.
Every single gunshot, enemy grunt, item pick-up and environmental sound was (lovingly?) reproduced by mouth, and it makes for quite an experience. Some folks will remember a similarly silly mod created for Half-Life 2.