Guests line up outside the Yerba Buena Center for the Arts in San Francisco for Steve Wozniak's surprise birthday party.
Steve Wozniak, with an Andy Warhol twist.
Tetris, Tetris everywhere!
Guests pose in front of Woz's presents.
AllThingsD's Ina Fried with the Woz-Warhol.
Even the wall gets a little Woz flair.
Guests in pink boas wait for the man of the hour to arrive.
The emcee warms guests up.
At long last, Woz has arrived.
What's a surprise party without confetti?
Woz speaks to the crowd alongside his present, art based on his DNA.
And here's the cake! Or...something.
Maybe it's not a cake -- it's a hot tub.
Woz got right into the spirit.
The real cake.
Woz gets a "nerd strip tease."
The strip tease continues.
"Everyone here is so young," Wozniak said. "I want to wish you as many happy years as I have had."
Blowing out the candles.
Woz speaks off the cuff.