Jack Black's Vices: 'Green Tea & Grand Theft Auto'

Jack Black says his two main vices are green tea and Grand Theft Auto IV.

The Tropic Thunder actor -- who has two sons with wife Tanya Haden -- is succeeding in his quest to give up smoking, but is addicted to drinking tea and playing computer games.

He explains, "I don't do anything exciting or dangerous really. I quit smoking, that was my last real vice. But I do like iced green tea - but that is so boring.

"And I like Grand Theft Auto IV. It's one of these games that takes 100 hours to conquer."

Jack, 38, recently said he wants to produce his own flatulence for his film roles -- because he could do a better job than a computer.

"I didn't do any of my own stunts in the fart department," he said of his Tropic Thunder character -- who can pass wind on command. "It was all with the help of computers.

"They don't have the technology to place the microphones in the inner canal of my inner cavity at this point. Someday soon I hope they'll have the science and it will catch up to my flatulent talent.

"A lot of people think I'm very gaseous but I cannot fart on command. I'm different to my character in that film and can't just fart at will."