The /mu/ portion of the infamous 4chan.org was dedicated to pictures and discussion of mutants and superheroes. Slower than other image boards it was not much different from the others; most discussions focusing on pro / anti mutant flame wars, NSFW torrents & photos of attractive mutant adult stars, profiles of prominent or obscure mutant heroes & villains. Some focused on trying to identify whatever mutants appeared in the often blurry action shots while others showcased the damage to some of London's streets and sidewalks. One popular pastime on the board was amateur pictures and footage of mutants in action. Almost as soon as the fights broke out in the Quad pictures and video from all over London of the XU teams began pouring into the board.
One of the largest and most popular recent threads, entitled "Look what I saw outside my window" was pictures taken with a digital camera from a third story flat which showed a giant female bottom clad in a red-and-white uniform. The thread had quickly snowballed with additional photos and video links posted, most of which taken from the ground at rather embarrassing angles for the subject in question. Other photos zoomed in on what appeared to be multiple individuals riding on the giant woman and attempting to identify them. A popular trend is quoting the original photo and posting a picture of rapper Rich Boy biting his lower lip while wearing sunglasses, with the caption "dat ass" written beneath it, as well as photos of similar expressions with the same caption.