Slipknot’s Corey Taylor was forced to interfere during his show when the mosh pit got a little too crazy.

During their July 27 show in San Bernardino, California as part of Knotfest Roadshow, Taylor halted the band’s performance at one point when he realized the pit was losing control. According to Reddit, fans were “starting to get trampled and have seizures.” Once Taylor noticed that people wouldn’t allow EMT to move in, he called out to the audience, “Nobody’s fucking getting hurt on my fucking watch, do you understand me?”

The 2019 Knotfest Roadshow line-up features Slipknot, Volbeat, Gojira, and Behemoth.