Wayne Coyne shocked more than a few rock fans with his riff to Rolling Stone on Arcade Fire back in 2009. "We’ve played some shows with them and they really treat people like s---,"  the Flaming Lips frontman said in part. "They have good tunes, but they’re pricks, so f--- ‘em."

Naturally, Arcade Fire's Win Butler took to the Internet with a lengthy response, insisting that he'd only met Coyne once before the bands played together in Las Vegas and was so jet lagged he barely remembered it. "I hope I was less of a 'prick' then telling Rolling Stone that a bunch of people I don't know at all are really a--holes," he wrote.

Coyne later apologized, then soon rescinded it.