Comedian Chris Rock stunned a pub crowd in Australia on Friday night by taking to the stage with a hilarious, foul-mouthed routine.

Rock asked promoter Artie Lang to arrange the show at the Roxbury Hotel bar in Sydney and then simply stepped up onstage as stunned comedy fans went wild.

The star, who kicked off his first tour of Australia on Monday night, performed for 30 minutes, poking fun at U.S. presidential candidate Barack Obama and Australia's heritage.

One lucky reveller, who saw the show, explained "He was hilarious. Lots of f-bombs (swear words) but he was really funny. He's going to be a big hit Down Under.

"There was only about 100 people in the pub. I guess he wanted to test his material."