Veteran actor SIR Ben Kingsley had to be shown how to smoke pot for his role in forthcoming film THE WACKNESS.
The Oscar-winner stars as a marijuana-addicted therapist in the movie - and had to be given instruction on how to make his smoking look realistic.
The film's director Jonathan Levine tells the New York Daily News, "I had to teach him how to properly hit a bong.
"It's kind of like herbal tobacco. It doesn't taste great or smell great, either. I felt bad for everyone's lungs."