This event is consistently one of my favorite San Francisco summer happenings. It's part skateboard comp, part chili cook-off, part death metal DJ set, a whole lot of daytime 40oz consumption and yelling, with a couple pools of blood thrown in for good measure.
Just give the shaky video I took last year a quick watch:
The vid obviously doesn't tell the entire story, and, if memory serves me, there wasn't much mid-80s action movie soundtrack being bumped. Lack of hair metal aside, this is a much better time that playing whack-a-mole with roving drum circles in Dolores Park, so grab yourself a Mr. Pickle's pesto sando and post up in Potrero del Sol Saturday afternoon.