Normally, concert films hold all the appeal of a postcard reading "Having a great time, wish you were here"; hey, ya missed it, and no amount of footage featuring a hip band or a bouncing crowd can make up for the visceral experience of being there. That said, this film -- which contains six years' worth of performances shot on that Indio, California polo field that each year is a gathering ground for in-the-know indie-rock fans -- is a blast, primarily because director Drew Thomas is less concerned with the talking heads than with the rocking heads. There is a little 'tween-song chit-chat -- love it when Noel Gallagher dismisses political bands as doing little more than "singing the news" -- but the music takes no back seat here. Every act featured (the Pixies, Bright Eyes, Björk, Radiohead, Oasis, the Flaming Lips, Kool Keith, Morrissey, Mars Volta . . .) performs one song in its entirety, and there's nary a bad cut. Wish there was a soundtrack too, 'cause that thing wouldn't leave the changer.