This is “Fatty Boom Boom”, Die Antwoord’s anti-Lady-Gaga song, performed live. Great band from Capetown, South Africa (rapping in slang Afrikaans, Xhosa, and English), with the most disturbing videos on the Internet. Lead singers are Yolandi Vi$$er and Ninja.
I don't see any videos from last Thursday's Oakland show on the Web yet, but this is close. The vantage point here is very similar to the one I had in Oakland: