"Lemmings" is a split single with Blink-182 and another band called Swindle. Released on black and yellow vinyl, it was released before Dude Ranch, the album on which the song "Lemmings" was featured.
Side two
The single's cover art is a direct take-off of the National Geographic magazine's distinct front cover. In fact, the top part of the cover says in a tongue-in-cheek manner, "Color Pullout Centerfold: The Inner Cavities of Sum Yun Guy (Page 182)" while the bottom reads "The Journal of the National Geographic Society, San Diego, CA."