The guitar face -- the look axemen get when they're too caught up in the majesty of shredding to worry about how ridiculous they look -- is typically associated with metal and classic rock. Fans of these genres have long embraced guitar solos, which tend to produce the funniest guitar faces, but even in alt-rock and indie, where musicianship is less of a factor, and power chords sometimes take the place of complex noodling, musicians have a tendency to close their eyes, wrinkle their brows and make with the hilarious facial expressions.

Below is a sampling of the funniest guitar faces. We've taken the liberty of cropping out the instruments and focusing on the mugs, so that each pained grimace and euphoric O-face can be fully appreciated. Take a look, have a chuckle and then do your best to forget what you've seen -- otherwise, you may never listen to a Clash or Black Keys record quite the same way.

John Mayer

Rob Loud, Getty Images

Brian Fallon of Gaslight Anthem

Ian Gaven, Getty Images

Dave Matthews

Ethan Miller, Getty Images

Billy Corgan of Smashing Pumpkins

Evan Agostini, Getty Images

Rivers Cuomo of Weezer

Brendan Hoffman, Getty Images

Mick Jones

Matt Cardy, Getty Images

Dan Auerbach of the Black Keys

Scott Gries, Getty Images