An incident between Mushroomhead fans and Slipknot themselves occurred when Slipknot trekked to Cleveland as part of their tour in support of their debut album. Mushroomhead fans flocked to the concert and peppered Slipknot with batteries forcing them off-stage. In a press conference, Slipknot lead singer Corey Taylor stated that members of Mushroomhead had encouraged fans to do these acts. However, Mushroomhead has publicly stated that the band in no way encourages this sort of behavior. In a May 2007 interview it Imhotep.com, singer Jeffrey Nothing stated that the day after the Cleveland incident, his then girlfriend went down to the venue and the members of Slipknot and some of their crew harassed her saying: "You're wearing a Mushroomhead shirt, what do you know?" Nothing went on to say, "The bottom line is: here is our city, our fans support us completely! They felt just as ****ed over by these puny 'Clowns' as us and they aren't afraid to show it. Welcome to Cleveland, bitches. In 2005 Mushroomhead dressed as Slipknot for three shows in the northeast Ohio area, avidly mocking the band.
Mushroomhead's 2006 Midnight Halloween performance started with an announcement over the PA: “Due to unforeseen circumstances, Slipknot will not be appearing tonight,” which was greeted by chants of “**** SLIPKNOT!” from the cadre of fans in the pit. Soon after, the lights came up, revealing their Nightmare Before Christmas-themed set, complete with falling snow. St1tch and Little Dan (Skinny’s drum tech and drummer for Ventana) came out wearing masks from two members of Slipknot. Dan wearing Chris Fehn’s mask with the Pinocchio-style nose, Stitch wearing Shawn “Clown” Crahan’s mask. When they weren’t playing the large drums at the front of the stage, Dan proceeded to masturbate his mask’s nose, and St1tch took off his mask and flipped the bird at it, eliciting fits of laughter from both of their fans. After the show, Pig Benis grabbed a Slipknot-hat from a kid in the front row and proceeded to wipe his bottom with it, then threw it back into the crowd.