It's a fact that when a musician is 'in the zone' they temporarily lose control of other functions, like sight. That's why guitarists pull some seriously funny faces mid-solo, when all the world is shut out and nothing else matters.
And yeah, we have respect for that. But on this occasion - just once - we're going to take a light-hearted look at a gallery of gurning rock stars. It is Friday, after all.
One more thing - legend has it that when a guitarist pulls a face during a solo, it's his sex face. We have no idea if this is true, but if it is, a few of these guys have something to worry about.
Feel free to get creative with your own caption contest in the comments!
Joe Walsh (The Eagles)
Richie Sambora (Bon Jovi)
Angus Young (AC/DC)
Alex Lifeson (Rush)
Paul Gilbert (Mr. Big)
Neal Schon (Journey)
Eddie Van Halen
Doug Aldrich (Whitesnake)
Thanks to Ultimate Classic Rock for the gallery.
Join our caption competition in the comments, we'll be looking out for the funniest entries!