For a scene in 3 Idiots, the actors were required to get drunk at their college hangout. So, as expected, perfectionist Aamir Khan suggested that the trio actually get drunk.
The scene was supposed to be shot at night. Director Rajkumar Hirani was very pleased at the way his scene was progressing. But suddenly the crew realised they had run out of film. Hirani didn't want to dedicate another day to this small scene and neither did he want his cast to get drunk again.
So, the director and his unit members went around looking for some other sets where they could find extra film reel. As luck would have it, a regional movie was being shot nearby and the problem was sorted out!