Chicago’s three-day, punk-rock carnival was host to Slayer, Jawbreaker, Raconteurs, Patti Smith, Rise Against, Bob Mould, Rancid, Bikini Kill, Lucero, the Struts, and more. Here are our favorite guitar-related moments from the 15th annual gathering.

Gwar’s Pustulus Maximus

The band's newest guitarist, Brent Purgason, slayed on his Dean ML during the theatrical metal band’s hilarious (and messy) set. His guitars are strung with D’Addario (.010-.046) strings.

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