As Ryan Adams explained in our recent interview, he suffers from Ménière’s Disease, a disorder of the inner ear that causes spontaneous episodes of vertigo. He explained it like so: “If somebody flashes lights in front of my eyes, LED or otherwise, while I’m onstage and starts a pattern of lights in front of me for long enough, I’m going to have a Ménière’s attack, I’m going to have an episode. My knees are going to get weak and I’m going to get really freaked out until I’m going to want to throw up or pass out.” So he wasn’t too happy when a fan kept shooting flash photos during a performance of “Oh My Sweet Carolina” last night at Philadelphia’s Tower Theater. About 2:45 into the video below, Adams justifiably goes off on the woman before returning to the song about a minute later to riotous applause. My favorite line from his rant: “Hi, my name is Ryan and I have Ménière’s Disease. If you flash me with your camera, it feels like you took a lightsaber and you sliced my brain in half.” Watch below.

[Photo by Paul Thomas/Getty Images.]