After a morning of extreme heat at the festival I saw them play, there was a brief but heavy downpour of rain in the afternoon, which happened to be when The Mars Volta were onstage. He was getting pretty pissed off that the crowd wasn't giving them as much attention as they would like, with many people putting their attention to the weather, trying to cover up, go buy ponchos etc, and had some nasty things to say about the crowds lack of response. It wasn't just one or two throw away comments either, he was pissed off and running his mouth between most songs. A real shame too, because musically I enjoyed them more than I expected, but can't get past that bad attitude, which there was no need for.