What is really going up actors noses when they snort cocaine in the movies?

There are a few methods, one is a trick camera where they show the actor using cocaine, then pan the camera away, and magically a line is missing. If they really do snort it it might be flour or sugar. But do to the magic of Hollywood i think its flour and a good camera angle.

There are a few methods, one is a trick camera where they show the actor using cocaine, then pan the camera away, and magically a line is missing. If they really do snort it it might be flour or sugar. But do to the magic of Hollywood i think its flour and a good camera angle.