street fishing - Utilizing a fishing rod, tackle, and dollar bill bait, Steve-O goes fishing for downtown denizens.
the hearse - Johnny Knoxville plays a bumbling mortician and keeps losing his casket in public.
Their ideas and methods, while often crude and usually wildly inappropriate, don't seem far off from many performance pieces I've seen in the art world. Would you consider being a public "Jackass" to be a performance piece? Could you consider this "art"?