Jack Black to stay sober on sets


Comic actor Jack Black has vowed to stay sober on movie sets because he is too scared to take drugs or alcohol.

Contactmusic.com reports that Black, who plays a drug addict in the new movie Tropic Thunder, admits he admires his co-star Robert Downey Jr for being able to work under the influence. But he insists his own sobering experience in acting class as a teenager prompted him to kick his bad habits while on the job.

He said, “I had an improvement class in high school and I came stoned one time. I was so paranoid that I never tried to f**k with it again. I marvel at some people’s ability to party and then act. I’m not built that way.”